I mean, the only discussion is: harassment is not criticism. Giving constructive criticism is easy. Just don't include insults, make dangerous threats, question someone's identity, intelligence, etc and you're fine. I've not been banned for giving other players advice in-game, so clearly I'm doing something right (I bring this point up because some people love to fearmonger by saying you can be reported/banned for giving advice).

And also that OP lied in the title.