An unusual situation came up on this post. I discovered the following information in a description of one of the edits. A person posted the question anonymously, but his/her browser crashed while he/she was trying to edit the post. The user made an account and has suggested and gotten accepted several edits to the post, garnering this account several reputation points. At the same time, people (including me) have upvoted the post and the original account (not fully set up) has 11 reputation, at my latest count. I flagged this post under other/needs moderator attention, but the flag was deemd unhelpful (with a message saying "declined-- flags should only be used to make moderators aware of content that requires their intervention). Either a flag was not the right tool to use, the moderators did not understand the situation, I should have informed someone else, or there is nothing to be done about this situation. What should I do in this situation? I do admit that my comment was a bit unclear-- maybe they thought that I was spamming random gibberish about reputation transfer. In any case, this seems like a difficult situation to deal with.
Flags used to be the right tool. The moderators could have merged the accounts and the OP would have regained control of their account.
But now they can't do that anymore.
Now you need to explain to the OP that they should register to the site, and then they can request the account to be merged. And if they don't want to do that... Well, too bad?
I declined the flag because there was nothing to be done. We can't merge accounts or move rep from one account to another at leisure.
Also, if I may be so bold, I thought the issue was too minor to waste time fixing. There are more important things to worry about than if an unregistered account misses out on 10 rep and unintentionally gains 6 through suggested edits. That is why I chose the "content does not require mod intervention" reason to decline the flag.
Anyway, to address your actual question, one way to contact us without flags is to check for us in the site chat room. I hang around there pretty often and it's okay if you ping me for a specific moderation issue. You can also post on meta to ask general questions, which is evidently something you've discovered.