Isopod, good on you for cleaning up that mess.
There is an epidemic of littering anglers out there. Two days ago I was fishing on the NSR and a couple of guys came down and asked how I was doing and we chatted. They mentioned that their buddies had fished that spot a couple of days before. I politely mentioned in the conversation that I picked up a ton of discarded fishing line and that was not cool. He agreed.
They set up fishing upstream of us and sure enough when they packed up and left, a minnow tub came floating down toward us from where they were fishing. That pizzed me off. Some poor attitudes out there for sure.