Comment: I was wondering how many decades we were going to ignore this shit (pun intended).  Saying it's from the houseless is comical.  There are tons of boats (big and small) that empty their septic tanks in dock.  Saw it at Keahi Lagoon.  But another good place to look is the Sandwater waste treatment plant, and maybe the slaughterhouse on the beach at Campbell, and the chem toilet folks in Campbell, and some of the pig farms with storm drains or aqueducts nearby.  This is a lot of shit.  Tons of great stories in where it's from, but don't even try and blame the houseless for this one.  Most of them use plastic bags and toss it in the trash.