Several HNQs have been mentioned here: chat.stackexchange.com/transcript/message/51881669#51881669

All three of them have been answered by a particular user who is recently back from a suspension. This strikes me as somewhat suspicious.

Perhaps it's worth merging this and this (I can't use flags so I'm posting here).

@XanderHenderson I'd think that's coincidence and if I have the right user in mind they were free to use the site since a very long time already (they did not by their own choice).

Generally that's not a good subject for chat.

@quid Indeed. I apologize. Would it have been better to raise a flag?

@XanderHenderson yes.