actually someone did get zero, i don't remember who
A zero rating would be achievable but you'd most likely need to cheat by using multiple accounts. This would be the reverse of using multiple accounts to boost your rating. I can't see anyone ever bothering to do such a useless thing.
I do! I do!
I went up against this one guy I never expected to beat in my wildest dreams, and I won three times in a row. On the other side of the ledger, I completely screwed up and lost to someone who had a queen and a half dozen or so pawns against a king and three, and couldn't work out how to put me out of my misery.
I should have tried harder to draw that last game. Oh well.