Golf would actually be a good idea, if the closest driving range weren't 20 miles away
It IS always fun to drive by it during the day and watch them hit the ball at the kid who goes to get the balls (a la a Family Guy episode

)
Alas, the best I could do is walk to my father's house and grab his golf clubs. *shrugs* Hitting balls towards oncoming traffic ain't a bad idea, but again, I'm outside city limits. Out here, there is a HUGE dropoff in population once you exit the city limits. I'll see maybe two cars an hour. This only applies to MOVING cars, because hitting balls at parked cars just ain't challenging.
But then again... golf clubs and huge bullfrogs... *evil grin*