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71 votes
Accepted

Why do we need to avoid to thank somebody?

The comment you sketch is fine. This is not what is meant. What is meant is that one should not post "Thanks!!!!!!!!!!", "This is so interesting.", "Best answer ever!" on every other good post one ...
  • 41.1k
58 votes

What to do when someone tells you something like this in her/his comment and then deletes the comment?

You should flag for moderator attention and explain what's up. Mods can check the history and see even those things which have been deleted. You should absolutely not engage with that user in any ...
  • 87.2k
55 votes
Accepted

Is it okay to leave stupid comments?

A joke here and there is alright; if somebody minds they can flag as "too chatty" or "not constructive". One should not overdo this though. It is also important to keep in mind that humor and irony ...
  • 41.1k
47 votes
Accepted

What's the best way to thank good commentators?

You should tell them to convert their comments into an answer (preferably a full answer). Then you can upvote that answer, accept it... Comments are not meant for hints or answers; they're meant for ...
36 votes
Accepted

Snarky comments to an elementary math question

I think your answer is fine - setting up the subtraction could certainly be sufficient to help someone with this problem, especially since it should be fairly clear to them where those numbers are ...
35 votes
Accepted

Is it rude to tag someone in the comments of an old post and politely ask them to check out your new question related to another post?

"Rude" is maybe a strong word, but it is certainly discouraged. If you do it once, likely nothing much negative will happen. But as a rule please do not do this. An exception might be if the ...
  • 41.1k
34 votes

Why do we need to avoid to thank somebody?

Let me begin by saying that I'm not disagreeing with quid. Generally, comments with "Thanks!!!!!" are entirely useless. The "guideline" that you cite, is a network-wide guideline, and the MSE culture ...
  • 375k
33 votes

List of comment templates

A new user who posts a pure homework question: Another version of something to say to a new user who posts a pure homework question: Context: I didn't actually know this thread was here, so I typed ...
28 votes

On mutual tactical serial upvotes and unconstructive comments

Your post leaves many important details open. Some questions follow: How are the answers? Are the answers that are being upvoted any good? If they're not good, then this is an issue indeed. If the ...
  • 17.1k
28 votes

Is there any point answering/commenting/voting on old posts?

The whole point of stack exchange is to build a high quality collection of questions and answers for a given subject. If you think of things in these terms, it is irrelevant how old a question is. If ...
  • 9,186
27 votes
Accepted

On mutual tactical serial upvotes and unconstructive comments

Some notes in the form of an answer. Moderators cannot invalidate votes. Any votes. Ever. (And those downvotes I received on that answer were certainly not appropriate! Why can't I invalidate them!? ...
  • 50.4k
26 votes
Accepted

I voted mistakenly to close as duplicate. When I realised my mistake, my comment explaining why was deleted.

Your Comment contained a link to an older Question. Although this Question was not the final target chosen by voting to close-as-duplicate, someone may have voted to consider that target the ...
  • 35.5k
26 votes
Accepted

showing gratitude for a very helpful / detailed answer?

Also when writing a comment it explicitly states to avoid comments like "thanks" or so. Based on what I've seen, it's more a warning because some popular questions would net hundreds of such comments ...
  • 33.1k
25 votes
Accepted

Is it okay to comment on others' answers for asking for explanation?

It's perfectly fine in my opinion (and judging by what I see on MSE, by the majority of people's opinion). In fact, I'm pretty sure this is the intended use of the comments feature: Use comments to ...
24 votes

Is it bad form to answer a question using someone else's previous comment(s)?

No, it's not. However, you should mark any such answers as Community Wiki, so you don't gain reputation from someone else's work.
  • 17.3k
24 votes

Is this an answer only site for people who just started here?

Yes, this is the idea. As long as you have not reached 50 points, you can only do posts (questions and answers). An answer should be an actual answer to the questions; it can be a partial answer too, ...
  • 41.1k
22 votes

Is it inappropriate to post a "Thank you" as a comment?

While I do not think that "thank you" comments are necessary, and would even advocate that in prevention of clutter that people do not post thank yous, I would also not be offended by someone posting ...
  • 69.7k
22 votes
Accepted

Comment etiquette: Should one delete a comment about a minor error after correction has been made?

Delete your comment, flag any associated comments for deletion. A toy example: User 1: "I think there is a mistake on the third paragraph. Not every $X$ is a $Y$!" User 2: "Sorry, I don't ...
  • 32.6k
21 votes

Is it no longer considered OK to post a comment of more than 600 characters as an answer?

In the spirit of the question: This started life as more of an extended comment than an answer. I think it has morphed into an answer now though. Math.SE seems to be based around the idea that every ...
  • 28.2k
20 votes
Accepted

Is it bad practice to comment on old questions with high views?

Don't worry about it. $\ddot\smile$ There are many reasons why older posts may not have comments, not the least of which is that comments are ephemeral. From the Help Center: Comments are ...
  • 17.3k
20 votes
Accepted

Etiquette for flagging a comment that points out a (corrected) typo?

The typo-comments you mentioned fall precisely under "no longer relevant." Please do flag them. It is also appropriate to flag comments that had asked for clarification that was later provided. ...
  • 41.1k
19 votes

Is this an answer only site for people who just started here?

I think the existing answer probably makes more sense to someone who's already familiar with how the site works, so let me try to explain the policy from a more abstract perspective: This policy is ...
19 votes
Accepted

When should one not edit their own questions?

Here are three options. Just make the edit. Better: make the edit, and leave a comment thanking the other user for drawing your attention to the problem. Best (in my opinion): make the edit, and ...
18 votes

Is undelete of comments already deleted.. possible?

Moderators can undeleted comments that were not deleted by the users. Namely, if you posted a comment and you deleted it, then moderators cannot undelete it. If, on the other hands, a moderator ...
  • 375k
18 votes
Accepted

Copy and pasting answers from comments

If it is a pure copy-paste of someone else comment, I think one should usually do all three of the below (although I personally do not care much for it being made CW), and at the very least one of ...
  • 41.1k

Only top scored, non community-wiki answers of a minimum length are eligible