I mean, clearly I am trolling for having the majority outlook on this matter :P.
Your way of thinking someone is toxic, is sooo far away from what normal people consider toxic, I'm not even sure we are playing the same game!
Like I said earlier, INTENTION matters.
You can go in without knowing the dungeon, on the pretense of actually learning it, and not be toxic.
See how you resorted to calling me a troll? I'm getting the impression that you are EXACTLY the kind of person that would be toxic in a group...
Let me guess, you instantly call people out for doing "something wrong", or having too low DPS/healing/tanking incorrectly?