
I think this could be done by adding extra headers into the replay .SDF file, using one bit for each player, 1 = dropped, 0 = not dropped.
Not sure is it even possible to rewrite on the replay file while playing... erm,.
Also it would be cool to know the times when each player quited, and how he quited (more statistics

Also, there should be some way to know if the game was finished or not, like if it crashed/quited/got kicked/etc it wouldnt tell the game finished.