Be friendly with them and let em know they are doing something wrong...

Dont be like "Hey I'm sorry you can't keep more then 2 fish over 13 inches."

Say something like "Hey I didn't know you can keep more then 2 over 13 inches or did the rules change?"

Play dumb on them and they wont be sparked to start a fight....

Cause I've seen it happen when some guys who think they are the WDFW get all pissy at someone who bends the rules even in the smallest of ways and I can hear them screaming at eachother on the dock and I will be halfway across the lake in my boat...