Its registered, inspected, and insured (for $14k) to me in Massachusetts with the 12 digit serial number....new Mass title in my name will be here in a few weeks
the only way they could tow the car on me is if I was caught driving it while performing a criminal act or driving with a suspended license, all the paper work is legit...pissed off cop or not, they can't impound a car because they don't like the looks of it, RHD cars are not illegal and as far as the Mass DOT is concerned its already been through an inspection (due to the previous Maine title) and therefor only needs to pass the state inspection every year. No one questioned it at the registry or at my insurance company, just "write a check for $xxx.xx and you're all set Mr. Hosmer"
-I have quite a few friends/family members who are cops...both local and state
and as far as "well its not legal in ____ state", I don't give a shit because I don't plan on ever selling it, I'll give it to my 1st born son when he gets his license