Maybe it was mentioned, what about trying a leader length requirement. It seems that the flossers use long leaders, to address that issue, it seems that restricting leaders to just 3' or less is an option.

many of the oregon rivers have the same problem during the summer fishery. restricting to bobbers really limits a fisherman. but I guess these people are not fishing they are snagging.

not sure really. bummer that a rule is made due to poor conduct.