First, let me state, I'm on RK2 so eveyrone 150+ usually knows everyone else. I've been reading a lot of issues on the boards about this person took this, or didn't post everything up, and several other posts about boss-loot. I haven't been in a team in ages that even stopped to loot mobs in a fight, but the obvious thing to do is to set Team Loot Alpha before the beginning of the mission so whomever gets the boss loot gets it. That still doesn't address the issue of people posting phoney loot or some other small tricks but it works.