Allow Self Bans for Mental Health

[Erev]

Seems like it should be easy enough - a button which inquires after length and a big ARE YOU CERTAIN dialog. In case of misuse an admin can reverse the bans. The downside is that the ban forums will get a bit busier - either due to 'my brother banned me/I was hacked' or 'I changed my mind! I don't want a two year ban anymore!'

On the whole I think it would be a positive feature. Heck, I could see me banning myself to be certain I did homework or went to bed at a semi-reasonable hour (8am IS a reasonable hour, right?)