Did the Vault a few days ago and I can tell you late night DF is....weird.
Got a join in progress and everything was fine, we got to the two knights after the first boss and noticed the PLD didn't try and stun either black nebula. I kindly suggested that he could stun it to make the healers job easier (since our HP went to around 1k after both went off) I was immediately met with frothing anger from the ninja who I now assume was the PLDs friend.
I'll give a run down of what I had spat at me in chat, I was pretentious because I had more than one 60 and what I was doing was directly against the ffxiv ToS.... Er yes, she insisted that giving in asked for advice was directly against the ToS and she stated she had filed tickets against someone recently for the same thing and implied she was about to do the same to me. I going to make it clear the advice was "you can stun black nebula" I did it in the most non aggressive fashion possible and was met with frothing rage.
I left the dungeon after the 2nd boss, I'm never doing late night DF again.
