There was idea of 'Staff for one day', senflow (or whatever was 'her' nick) got smod (iirc, I'm not sure, that was long time ago - some kind of staff position anyway) for one day and it was removed day after.
We, GMs, had few trials who quitted after few days, there is no need to give out nicks, tho.
There was also a guy 'I'm a dev but I can't code' who got fired pretty quickly, you probably know who, if not, even better.
I can't remember more examples atm.