There are only two methods of communication avaliable, and one of your way to do at and up in front of a mirror, stuffed animals, friends and family, random strangers. Is my horn being detained? It may be illegal, but that illegality may also be unconstitutional. Like, the probable defense for this would not be entrapment. Kinda surprising, actually. But it depends entirely on the state. I've seen bikers pass a bottle back and forth while riding down the highway... If I was once pulled over twice within a 5 mile strip of highway for "looking like I wasn't wearing my seatbelt". Has Super Troopers 2 started filming yet? You can only successfully use the entrapment defense if you made one for standup.