Really? Asking why I think it's unwise to ride with a long-arm strapped to your back? Aside of the personal safety issue (you're right, it's a free country and you risk your own life every time you ride) there is the issue of accountability for such a weapon of an M4rgery. You draw quite a bit of attention to yourself when cruising about with something like that in plain view, and there are MANY people out there that would be happy to take you out just to get their hands on that weapon and use it for ill purposes.
Where do you live Detroit? Where I'm from shotguns in truck windows and civilians wearing sidearms in plain view are not cause for panic. Sure A guy with a rifle strapped to his back on a motorcycle is less commonplace, but there's nothing wrong with it.
It's not like I'm riding down the street shooting indiscriminately while pulling a wheelie.
(we really need to stop thread jacking)
M4gery?