I agree with Joe Meyerson.
Provided that a poster is civil and remains within the bounds of the TOS that poster should be allowed to continue posting.
I for one have found that ignoring Serge's non wine related posts isn't that difficult. For me the bickering and name calling that happens whenever Serge pops up on a thread is more off putting, simply because it dramatically increases the number of BS posts I have to read before coming across wine related material.