Fencer: Well, I posted a comment on the blog but now I see it's also being discussed here. My sugestion was to make it so a Delete button displays after one of the players hasn't logged in for a long time (or, now that I think about it, after a move hasn't been played in a long time).
Deleting the game would forfeit it without affecting any of the players BKR, of course.

If they're both friends that will want to resume the game 2 years later, then they won't use the delete button. If it's a game you're stuck with, you can get out of it without any consequences...