Some people honestly do not know better. I stopped 3 kids in their dads boat in Turner's last year and told them they were being inconsiderate and they had no clue what they were doing was inconsiderate. They ran wide open thru a bunch of boats and everyone was throwing their arms up in the air after they went by, but I stopped them and let them know. I like to think that they learned a lesson that day, but who knows. You should really let these people know, maybe they just don't know any better.
That being said, last time we were at Cyp Point 2 boats came wide open at us and stopped and threw down the trolling motor 50 yards away and I could cast across their lines

. Tried to be nice and ask them why they were doing what they were doing, but they were all old fellas and pretty mouthy as well. We just sat and cussed each other for 5 minutes

Ain't worth the hassle sometimes