Hi All.
Is it Legalor Not,?? I really don't care. For one thing, if you never say anything to anyone, who is going to know what you dumping in the Trash Container.
People get bent out of shape so easily these days. I would think that digging a so called Cat-Hole like hiker and Back-Packers do. They just dig a hole and do their business and cover it up. It hurt nothing at all.
Yea, we all know over the years, that there been some pretty nasty stuff dumped into our Dumps all over the country. I also don't see anything wrong with dumping a small 5 or 6 gallon small Black Tank down an out-house Toilet, or a Campground Bathroom.
Do what ever you think is right for yourself. Same story about Carring a Fire-Arm. Don't tell, and nobody will ever know. And know we don't use a Cassette Toilet.
We have seen plenty of some pretty funny stuff in our 46+ years as "Travlers", "RV'ers" and "Boon-Dockers". "Time to Lighten-Up People".
Good Luck. Happy Travels. Dan & Jill & our two "Small Yorkie Kids", who love to travel as much as we do.