Ban bypassing (we ban 1 account, they have others) is the main reason.
I would also add that "noob" accounts are fucking annoying. Just play as you are, no need to try and fool people.
I also encourage you to come up with a reason as to why they're needed. Sure, family/friend accounts but that just opens a big loophole and computers are cheap these days, especially one that can open AA.
Lol some people dont play games all the time, so they arent going to go out and spend 200+ or 100+ w/e for a pc (especially when they dont have much money to start with) so it can sit in a room 6 days a week and on the 7th day they only play for a few hours. Not everybody who plays games is really a "Gamer" i guess you could say.
And the reason i think it is needed is because 90% of the people who do play AA, Cod, really anything has more than 1 account, more than 1 character its how people play games. Your telling me all this time uv played AA uv only had 1 account? No i dont know ANYONE who hasnt made more than 1. Or played an MMO and only had 1 character ROFL no. That's not how 99.99% of the population works. We like to level up some, then restart > swap back and forth. That's just human. IDK why its such a big deal here, you prove to me that more than 10people has only played AA from 2.3 on with only 1 account il quit and this wont be a discussion anymore.