Then there's the small group of people who try to change for the better after a permanent ban, only to find that it's MORE work than just breaking the rules, with not much actual reward until an obscene amount of effort is put in. People like this are gladly welcomed back by Riot, as I was essentially told exactly that in my conversation with one of the Player Behavior staff members.
Compare that to someone who doesn't want to, or doesn't care enough to, change, who just makes a new account and harasses new players, buys a new level 30 account, or just says "screw Riot" and leaves. Guess what, that person 'wins' with minimal effort no matter what they do.
In the real world, evading the rules to get what you want lands you in jail. In League, you can literally just keep right on doing it until you get bored of it and leave.
I've said this a few times in various threads, but it just really bothers me.