I wouldn't recommend that. Picture this...

One user (say a new player, although it doesn't matter) decides to turn this automatic passing off. They play a game with a user like Long John who feels the most important thing on this site is for games to go as fast as possible. It so happens that LJ is to make several moves in a row as his opponent cannot move. However, because this user has the option turned off, each move must still be passed. And it turns into a similar situation as to what happened with the whole resignation things - whoever doesn't turn this "option" on will be pressured by such users into turning it on and it would turn into a huge argument about "It's an option for a reason" and "If you can't make a move, why not let me move again?".