One can only hope that those guzbuckers got some sidewinder action while they were dumping their trash. Even a few scorpion bites would be fitting for them but most likely they didn't meet any and will return with more garbage at some point.
I would bet money that in that garbage is a old piece of junk mail with an address on it, and it would be fitting that the garbage ended up back there at that address.
Good luck with the cleanup and continuing to fight the good fight,
Sult