I'm petty and I blacklist anyone who lets the timer on end of raid items almost run out on purpose before rolling.

If I say "Roll on loot please" And then you don't roll and make everyone wait 5mins to see if anyone will leave first because they are sick of waiting, I WILL blacklist you.
I have the loot tab open, and everyone can see you haven't rolled. And then you try to lie about it, saying you have, when everyone sees at the end that you haven't...
Imma blacklist you for that.
Stahp wasting everyone's time, I don't want you joining any of my farm parties if you are this kind of person, which is why I blacklist :V