I would trust someone who plays with that mentality (chronic side-hoppers) by roughly .009% of the distance that I could physically throw them.
Fly with all sides and then pick one and be loyal.
ROX
I side-hop a lot...to find fights. Whatever country I'm on, that's who I'm loyal to until I go elsewhere. I don't bring any baggage or intel from the country I was just flying for. It's not that hard a thing to do, and I've never been accused of foul play - because I conduct myself in such a manner that nobody has ever questioned my integrity.
Went to EW last night. 9 nits and nobody else - they were all attacking rook so I switched to rook. Had a helluva fun time and eventually others came in and evened things up and for a couple of hours everyone was fighting and [presumably] having fun.
So, yes; by all means switch sides if it means meeting more people and having more fun. Let your actions and attitude speak for you when the fanatical chesspiece-loyalists give you a hard time about it.