Unban him and it will be a matter of time until he's banned again. Even if he wasn't hacking (he undoubtedly was) if his play style 'while drinking so much coke' (seriously? This is your excuse?) is such that his mouse movements become aimbot-like (impossible unless you seriously have a physical handicap or do it on purpose), we'll just get another demo of his Parkinson's riddled kills and ban him again.

Also, anyone who comes on the forum and pleads their case by stating 'I've played CS since it came out I've never had to hack because I'm soooo goooooooood' is a hacker.

I would not go overturning confirmed bans (by two ULAs and one clan, at that, all three of which REFUSE to ban ANYONE unless CLEAR and CONCISE evidence is provided in demo form) because the old demos are no longer viewable. That sets a very dangerous precedent. myg0t gonna be all over this forum posting unban requests. :P