Crashies wrote If you did the prestige glitch would you be considered a ...
Modding/Hacking

Any user who runs a modified version of game code or uses a modified game profile is subject to penalty.

First offense: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.
Console users who modify their hardware or profile data will also be reported to console manufacturers. PC users on Steam will be reported to the Steam enforcement team.

ORRRRRR...

Any user who abuses an exploit in game code or other established rule of play is subject to penalty. An example includes but is not limited to using a hole in the map geo to intentionally go outside of the map boundary.

First offense: User will be temporarily banned from playing the game online, will have their stats & emblems reset, and will have their leaderboard entries deleted.
Second offense: User will be temporarily banned from playing the game online, will have their stats & emblems reset, will have online split-screen privileges revoked, and will have their leaderboard entries deleted.
Extreme or multiple repeat offenses: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.

PS. I didn't do it, my friend did.