How do you know it wouldn't slow down the server, Mike? The other sites (especially IYT) almost guaranteed have much faster servers than here. So their servers can tolerate the added members and calculations required for this. Maybe it wouldn't be very much slower if this was done. I don't know what kind of server Fencer has, and it would also depend on the number of backgammon moves (which seems to be quite a bit - quite a popular game).
I am not going to argue about it anymore, however. I believe i have made my points, and do not need to make them again.