You run 50 lbs so the tires do slide cross the pavement, otherwise you start breaking axles. Even at 50 psi the center three rows of tread on my tires were wearing evenly and as i said before, this is with at least 1,000 lbs less on the tires. that means my rear contact patches are probably about 3-4 square inches parked, which really isn't that bad. My last car had about 2 sq. inches parked and about 1/2 square inch contact at 60 mph (and that's the way it was supposed to be )

All you have to do is not drive like an idiot and you'll be fine. I never lost my truck ever. Not in the rain, snow, ice, dry, anything. The reduced contact is no big deal if you know you have reduced contact and drive accordingly. Other big part is to go into an empty parking lot and find out when he tail breaks out. you find this out and you'll never lose it.
(unless you want to )

Justin