Motorsports

The yards had to put up fences, or crush/scrap the cars. Some of my local buddies got an award for using dirt berms instead of fences - in a few years, it just looks like brush growing up to woods.
And the crushing thing hit a critical mass with Ladybird's roadside cleanup - The junkyard guys near me who went into portable crushing had 3 tractor-trailers with "Ladybird" on the bug deflector, and they bought a lot of race cars from turning old Buicks into angle iron.