I have been watching magnet fishing and people love to toss stuff over bridges without a second thought on the environmental impact. Hiding evidence I can almost understand but not lawnmowers, car batteries, etc.
It seems deeper fines should be made to discourage this terrible behavior.
It’s mostly people that don’t have or don’t want to spend the money on the dump fees. Some localities have annual (or more frequent) days where workers pick up such items for free. This really cuts down on illegal dumping.
I would add that driving all the way to the dump with something in a truck isn’t something everyone’s able to do