a10s should not be got back, on two occassions he has made fake accounts which is against the rules which you sign up to when you join the forum. he was given a second chance after he did it the first time, and he did it again; reguardless of anything else anyone might have against him, breaking the rules after being given a second chance is inexcusable.
i agree with the rest though, apart from a10s, there needs to be a better system. i dont quite know what the locked mod subforum is about, but they are a group of people the admin of this site (Adi) trusts, and if a mod sees a redundant topic or member who has broken the code of the forum, they should post about it in a 'Mod Discussion' topic which should discuss appropriate and fair action. With redundant posts, i think it should be up to mod discresssion where if they feel there is a need to, pm the member in question as Tito said, and give them a frendly word of advice.
sounds good? nothing to do with age or post maturity, just on a post by post basis.