i thought now would be a great time to argue the issue of out of state license plates taking up all of the residential street spots.  I have a plan!  Apparently (someone correct me if i didn't read this properly) MA excise taxes are due from everyone who parks their car in MA for more than 50% of the year.  (This would apply to all of the students and such who claim that their car is their parents' and thus don't register or insure it in…