Maybe cuz the intent is to warn those approaching of your intent to back up?
Was thinking once again about this moral/legal issue. I think we've covered the bases. The advice I would give on an open forum to "the general public" is to simply do what's right and what's legal, period. What I would do with that annoying beeper on my car... might be another. Shotgun comes to mind... just for the joy of hearing it shrieking one moment, and then watch it cough, sputter and die... the next. Red neck engineering at its best. Promise to come visit me in jail?

Truth is, I don't have this on my ICE Tucson. Thankful I'm not faced with the decision of what to do. I don't think I can be trusted on this one.