The following section of the United States Code requires that people fill out their U.S. Census forms and provides a $100 penalty for not answering the Census and up to $500 for giving false information.
13 USC Sec. 221
http://geography.about.com/library/misc/blusc13.htmSo far the Census Bureau has offered no indication that it actually intends to charge violators or impose these fines, but if you fail to complete and return your 2010 Census questionnaire, a census-taker will be paying you a visit.
http://usgovinfo.about.com/od/censusand ... quired.htmMasteroflightchick - in your case - if you tell them to piss-off - I imagine a hurricane will take out the Census Bureau headquarters and that will save the rest of us some aggravation.