Doh!
This looks to be my mistake. I've been purging spammer accounts pretty harshly, and it seems I accidentally wiped yours as well, without even noticing. It's possible your IP matched that of a spammer (it happens), but usually I avoid deleting legitimate accounts even if they're flagged.
You've definitely done no wrong, and we would send a notice if we do have cause for action.
I'm very sorry, I'll do my best to not repeat my mistake.
:(
Paul