Keel haul, it's a good idea.
I wade in both our rivers with a spey rod and occasional big fish, and sometimes see desecrators, always see their trace. Old Soul, you would have to think long and hard before chucking trash into water, others it comes to quite easily. It's crushing to see.
There is always a trash bag in my drift boat, it never comes back empty. Never.
I always "catch" something.