You could get some Rabbit Hunt chips and sell them at the start of the night for an amount that discourages it (say $2 in a .25/.25 game, $5 in a .50/$1, $10 in a $1/$2. Money goes to a worthy cause (dealer tip, BBJ, beer fund, league trophy, charity donation, etc.). Must be redeemed that game, or refunded if not used (no, you can't take them home with you!).
Or just say no!
Having said that, at a recent game when everyone folded to my flop bet and I was left holding an open ended straight flush draw, I sure wanted to see the turn and river...