Things like that happen pretty well everywhere, unfortunately. Everytime I go to the coast, I see just yards and yards of trash - most left by the fishermen (beer cans, etc). It is getting harder to be able to go places I used to go all the time.
Here on Oahu, the city recently took away all the road side parking along the beach, and is forcing everyone into parking lots (where lots of cars are broken into). This means you can no longer stop along the beach to take photographs, and if you park in the lot, not only do you have to worry about your car being broken into, but you have to face the speeding traffic (people here don't follow speed limits either) while walking along the road to your chosen spot.