I just try to park so far away from others that no one (else) would be stupid enough to park next to me. It's just around 30 meters more walking and my car is still spotless!
Of course it feels "less secure" when you come back from grocery store and have heavy bags in both hands...
Yeah, and don't park next old BMWs, Mercedes or Audis, there may be a 100kg 90 yearls old sailor coming out from his car and he needs all the space to open his doors. And those minivans and other alike cars made for 6+ people are those cars I never park next to. The younger kids coming out of those cars couldn't care less/don't understand about opening the doors that they wouldn't hit the next car... omg!