Remeber halo 3 when players would create secondary gamertags to boost their friends to level 50’s?
People would create a secondary tag and quit games hundreds upon hundreds of games actually or leave their xbox on day after day to keep that tag in ranked matches idling with the hope that gamertag never won a single game.
The ojective was to get that tag locked at a a low level and make it nearly impossible to level up that way you could go into ranked games and since you had a horrible record the game would give you easier games even if your friends had high levels.
Your friends could all be level 48 - 50 and since you were a level 20-30 with over a thousand games lost the game would match you up with colonels at around level 40-45.
Im glad people get banned in halo5 for quitting games thats what should have happened in halo 3 as well.