I just had four games in a row with teamkillers who were clearly coordinating with the other team, between 2 P.M. and 4 P.M. on Nov. 11, 2014. I just recently started playing Halo: Reach (im using my bros account, hes played tons before) and I like the grifball (as i did in halo 3, mostly cuz im an awesome quarterback), but I've noticed I'm constantly running into groups of people that are on both teams, working together to... do something... I'm not sure, maybe farm kills or something for points? I saved one of the videos as evidence, and get get the other 3. I'm gonna continue playing, and I'll just hope I won't keep getting this problem...