Not even from 10,000'
Still you could always put it down in the LA river
I can't even judge 500' myself and I have been flying for over 12 years. Anyway I wouldn't bother getting involved unless I saw someone blatantly being an alpha hole fool flying up the beach at 50', then I might if I had evidence.
TheRule 5 bit quoted above only applied to a "congested area". What constitutes a congested area is a bit of a grey area actually. Central London would be classed as a congested area, as would central Somehwereelse. Whether or not some little village in the middle of nowhere would be, only the courts can tell.
Some guy was busted for flying over manchester a while back. Actually he wasn't as he argued he was on an ATC clearance (absolving him of the foot rules but not the glide clear) and the fact that there were landing spots available which weren't "normally used for recreation" then he got off if I recall correctly.