1. Grin and bear it and hope they go away and that other players who contribute more positively don't leave because of it.
2. If they are musically disruptive then the MD should speak to them. After all, the MD is in charge of the musicality of the band - if the player thinks they know better they shouldn't be there IMHO since they will not listen and pull together with the rest of the band.
3. If they are disruptive in other ways then they should be spoken to by the committee. It's not acceptable for someone to cause problems in a band and upsetting people who are there for FUN.
Just my opinion. Why lose players who make positive contributions over one person (no matter how good they are at playing the instrument)? The band is greater than the individual - always.
Is the person in question just shy? Or is the person actually agressive towards other members?
I think it's quite acceptable for a player to turn up to band, play their heart out and then go home without socialising with anyone. It's nice if we can all be friends, but if a person does their fair share of work during rehersal and wants to keep to themselves, then the band should respect that.
If the person is offending other players by being arrogant, then it's fair to have a chat about his attitudes towards other band members. However, I bet if the person in question was a big name professional player then everyone will just keep their mouth shut. (so i guess my point is that in a perfect solution to the problem there needs to be a change in attitude from BOTH parties.)
I'm all for diversity and you have to accept that some players are not going to be the same as you but if they are out of line then they need telling.
It can be little things that rub people up the wrong way :
Expecting everyone else to run around after them
Not putting their stand away
Not paying subs
In which case there should be someone appointed to deal with 'bandroom etiquette' who has the right to say what is expected of players and bring them in line. Often these people are completely unaware of what a pain in the a*** they are.