Hello
I would want to tell you guys about a level 60 warrior named "Ulkair". He was going to tank BRD.
What happened is : he indirectly told us that he was going to ninja BoE and fiery weapon formula and send it to his main. When we tried to explain to him that he cannot behave like this just because he is a tank (very common, i have personally noticed) he said "do you really want to argue about this?". More people joined in and disagreed with him needing loot he doesn't really need. When we were all about to begin the dungeon he left.
Now imagine that I have sit down for around one hour, trying to get a group together while he sit back and do nothing. And then he just destroys it all, because he can't need everything.
I encourage other people to join in with this list. I'm not necessarily saying everything is black and white, so, people should not see these people as bad persons. This is simply a record of bad behaviour they have contributed to.