Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
The way I would do it is if you are playing, and the opponent had only 1 move (or pass) to do - then you can then play your next move (and so on and so on) until the other player can move.
Then when the other player goes to the game, they will see a note: "Because of automatic moves, your opponent moved XX times. Would you like to go through each move or go strait to current move?"
That way for inexperianced players can go through all the moves to see what happened, and others can just skip what they know is going to happen and start playing more quickly!
I believe the rationale for not implementing an "auto-pass" is that a player must go on and actually make the move, whether it be a pass in backgammon or a forced move, such as in chess. It is frustrating in some situations, but why should the system make an automatic move for a player who is out to lunch? This would also require extra programming.