It happens. You shouldn't post about it because everyone says "good, enjoy the ban." Most likely you played trials with someone not in North America or you yourself are not in North America. It has happened to me once because I played with someone in Scotland. We didn't lag and neither did the enemy team, we won about ten percent of our games, yet we got a 48 hour restriction. Bungie hasn't implemented the new connection/matchmaking system to 3v3 yet and once they do the real cheaters will be banned. Until then, only play with people on your continent