Most horses and riders ARE insured. They don't have to be by law, but most people don't take the risk as they know they can't afford the vets / repair / legal / hospital bills if something goes wrong.
Horse crap isn't a fine like dog crap because it won't ruin your life. Horse crap isn't a fine / sentence like litter because it rots away and isn't killing wildlife or damaging the environment.
There have been a few comments about having to dodge horse crap when driving a car / riding a bike. If you dodge crap and crash, you were going too fast, no sympathy. If you don't dodge, hit the crap and crash, you were going too fast, no sympathy. If you don't dodge, hit the crap and are complaining about cleaning your car, you need to get a life... Sh1t happens!
Edited: Fixed typo.
So throwing a Mars Bar wrapper out the window is going to ruin someones life because you can get fined?
FYI - This thread escalated quickly