Sorta backwards gun registration (if yer NOT on the list you have a gun) but I like the tax the libs idea. Turn around is fair and all. 
Thats true, but think of it this way. There a few states where antis are trying to get ccw holders covered under open records acts. I Vt., you could have the reverse, a list of unarmed houses for the crooks to peruse.

FQ13