That doesn't even seem Constitutional. How could a city infringe on someone's right to vote? What happened to your civil rights?
Also, I've never heard of a census for consecutive years (who could afford that?).
I thought voter registration was done by county, not by city. At least, it is in my state.
Sounds like a scam to me.
Edit:
Found it:
http://www.sec.state.ma.us/ele/eleinactivevoters/inactivevotersidx.htm
Isn't Massachusetts part of the United States? That is so weird.
