This thing about off-topic and on-topic is such a subjective concept.
Especially because people tend to perceive topics differently - and have very different levels of pedantry.
I think it's the sort of thing that must be left to the individual moderator - because having posters call the shots would be a nightmare of never-ending proportions.
Personally, I rarely fret about it - but I do try to respect the topic at hand.
As for me going back and forth with people - that's very true. But I don't know why the other person isn't named when that is brought up
It's not like DArt + random person going in circles = 1 person.
Also, to my own credit - I think I stopped doing that for long - long ago.
It's the actual reason I never stick around - because I don't want to get caught in that trap.