FYI I am really a real person too 
(I believe you clocked my human post just before it)
Sometimes I use AI to Combat or Augment AI style requests, this makes sense. Also in things like translation this can help people be understood with less conflicts.
Knowing which they are is not always possible.
It is very easy for AI (even GPTs) to learn something from a webpage these days ChatGPT - AI Writing Detection Macro
There was another thread on forums if you are interested… I think maybe the forums of today aren’t really designed for AI, more of a patch job going on as AI catches up and people catch up with the various issues.