Perhaps, but "citation needed" is always just an attempt to shut down those who don't fit the 'decorum'. It adds nothing to the conversation and is not good faith forum participation. There is no quote taken that could be cited, and there never is. The request is impossible to fulfill. Of course, that's the point.

This anti-social "unless your words come from someone I respect, I don't want to talk to you" behaviour has most definitely shown to extend out into the real world. That became quite apparent during the COVID ordeal. But it is less clear if that was always the case, or if social media has made it more prevalent.