Some of the areas I fish in California have PVC Fishing Line Recycling Stations contributed and installed by some local Boy Scout troops. I also have a few of the monomasters in my vest.
Last year I was walking on a trail along the bank of South Fork Bishop Creek and got tangled up in a web of what appeared to be about 100 feet of 12 lb test mono. Dang near broke my knee on the rock I fell on.
I blame it on laziness. Same people probably don't clean up after themselves at home. Jim