343 industries has posted information pertaining to arena rankings in halo 5: guardians, how matchmaking will work and what will get a player.
In previous halo titles, players would receive temporary bans for betrayals and quitting games, amongst other misconduct, and permanent bans. Halo 5: guardians to add stricter rules for multiplayer offenses is enough to earn a ban and be prevented from the matchmaking arena.
The halo 5: guardians multiplayer beta that was conducted december and tune matchmaking to provide a better experience for halo 5's launch there were some very positive effects but even with the change there were.
Matchmaking rules in effect for misconduc - posted in tech center: never cheated in my life with halo, ive had nothing but random disconnects (no other affected just halo) now i am apparently under matchmaking rules for misconduct halo 5's bans for reports and dropping is very harsh for very little.