13 U.S.C. 221, US Code states:
"(a) Whoever, being over eighteen years of age, refuses or
willfully neglects, when requested by the Secretary, or by any
other authorized officer or employee of the Department of Commerce
or bureau or agency thereof acting under the instructions of the
Secretary or authorized officer, to answer, to the best of his
knowledge, any of the questions on any schedule submitted to him in
connection with any census or survey provided for by subchapters I,
II, IV, and V of chapter 5 of this title, applying to himself or to
the family to which he belongs or is related, or to the farm or
farms of which he or his family is the occupant, shall be fined not
more than $100.
(b) Whoever, when answering questions described in subsection (a)
of this section, and under the conditions or circumstances
described in such subsection, willfully gives any answer that is
false, shall be fined not more than $500.
(c) Notwithstanding any other provision of this title, no person
shall be compelled to disclose information relative to his
religious beliefs or to membership in a religious body"
The issue for me concerning the conduct of the census is 1) what questions MUST we answer? and 2) (which informs #1) is what is the purpose of the census? As I read the rest of the code, the census is for apportionment of representation in the legislative branch of government. If that is the answer to question #2, then the answer to question #1 must be, only those answers sufficient to determine voting population.
However, the marketing plan and implementation of the census has not, is not, in keeping with the way I read the intent of the census itself. It has become a means of profiling, and collecting data that is not necessary to apportionment. Its your call; refuse and see if they fine you $100. Or falsify and see if the fine you $500. Or only answer the primary questions related to apportionment, and see what happens.