I'm pretty sure I'm the only admin who actually approves new accounts. And sometimes I'm not sure if an account is a bot or not (googling the IP, username, address does nothing, nothing in the profile seems to hint at it) and I just hit accept. But I alway worry I might delete a legitimate user account thinking it's a bot (which has probably happened before), so I try to give the account the benefit of the doubt and approve it, figuring I can always ban it later.
But we get over half a dozen bot registrations a day, FYI, so it's nothing new. I just let a couple slip between the cracks over the past week.