There is a comment template, meant to be used when a user posts an answer which really should have been a comment, which reads:
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post.
The problem is that it is often used for answers which, although arguably should have been a comment, in no way resemble a "critique or request for clarification". This just leads to unnecessary confusion and appears rude. It's not so bad if the recipient realizes this is a template response, but most people will just think "WTF is he talking about?"
Recent example - Two numbers equality formula. Happened to me as well - Substituting the value $x=2+\sqrt{3}$ into $x^2 + 1/x^2$.
Should anything be done about it? A reminder that this template should only be used when appropriate in context? Changing the text of the template to be more generic?