I did that once when I was an Admin on another site. :D
The guy I banned was the owner of the site too. but it was just in good fun and to see if it would let me.
I have been asked on here a couple of times before and my reply was "No thank you, as I would rather have my butthole scrubbed with a rusty wire brush". :D
Almost would too, since that would at least heal some day.
The damage that can be done to a person and their outlook on the site or people can be a permanent thing.