You have to be $hitin' me. They can haul you in for pissing. I am the first to hang it over the side of the boat and think nothing of it. That would be a bummer to get taken away with my unit in my hand.
In my opinion, as long as you are in the woods or not exposing yourself then whatever. We were at an airport and one of my buddies hung it off the parking garage. That was a little much and we almost got taken away for that, but the beach? Tell the guy your sorry you made him realize his short comings and there is medication and pumps if it really bothers him.