Non-Japanese animated material goes on /co/? /co/ ignores them and they seem more like /a/ material.
If you are banned, your pass is revoked and you have to pay again to post.
How long do you think shitposters, spammers and trolls would stay around with that system in place?
This is clearly the answer to 4chans problems and would create an environment where people think about what they are posting and strive to contribute quality to the site