This used to happen to me all the time when I lived in Mass. The mexican immigrants and russian immigrants come from a culture., IMHO, where if you can do it, or get away with it, then it is ok. I could not stand it, but where I come from they all had knives or guns and LOTS of friends so I would usually just leave (you get tired of getting surrounded by an angry mob when you confront people about breaking the law).

Now th only thing I have to worry about is this incredibly good japanese fly fisherman who has cleaned out a couple good holes I fish. He doesnt ever seem to keep anything illegal, but he catches his limit darn near every day and keeps them.
I guess I am just jealous I cant catch that many fish on such a regular basis...