How's this for a possible solution to people being timed out on vacation?
Have a 'delete' or 'expired' option appear if the time eloted for the game expires. So IF the game gets deleted, no points are lost or gained.
One possible drawback is having a good/fun game deleted. If that's the case, then perhaps a restoration process can be developed to cater to those individuals.
With this kind of system, vacation settings can't be taken advantage of, and all the points are ultimatly aquired by a genuine win, loss or draw. Any other acquisition of points just serves to invalidate the rating system, and isn't really true to the spirit of the game.
My 2 cents anyway, what do ya think?