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.
people are inherently lazy. fines are only for poor people.
if you want to solve the problem, provide an easy method for the general public to correctly dispose of shit, and let them know about it.
the issue being that that kind of social awareness and general action costs money, and conservatives would rather watch the world burn than have their taxes raised.