Anything we can do to when people abuse overnight parking?

I wanna tell you, I've overnighted at MANY Walmarts all over the country on my 2, 3, 4 day trips to wherever I'm going and have never seen any of the abuse reported on this forum. Could be because I pull in late and leave early that I miss the 'campers' and bums who hang out there. Just like the 'People of Walmart' web page, I've not seen any of those weirdos in the ones I patronize. Some strange sights, yes, but nothing to the level of that site. Maybe I just pick the high class WM's to stay at. ;)