I was playing Halo MCC reach grifball games and out of nowhere after we had gotten a bunch of kills i got disconnected from xbox live but was able to still play, then a moment or so later Easy Cheat kicked me out of my game, the same happened to my whole party of 4.
we also ended up getting deranked by 2 ranks of XP because of it.
I dont know why we got kicked, my friend said it my be a anti griefing system over anti cheating.
none of us were using any cheats, but we were trying to grind kills online in grifball because it is the best source of XP in Halo.