If you are asking me and can't see the difference (which has been explained multiple times) between doing a BOS on a vehicle that legally requires registration, or any other object for that matter that isn't prone to targeting by thieves and which has ownership protected by the Constitution, and has an entire industry lobbying for it's elimination... well.... I'm quite certain I won't be able to explain it.
Well not just you in general but folks who refuse to sign one. I guess my point aims more towards those who say they wont do it because of a stranger having their name/address than those who refuse due to 2nd Amendment rights, etc. Either way somebody can get your info. Heck I'm sure most of these pro gun sites have government agents trolling them.