If you had an experience like mine I recommend contacting your congressman
  and senators. I asked the ACS interviewer 3 times why they couldn't get some
  parts of the survey from the 10 year census which I already completed and was
  simply reminded that is a different database and they are not connected. 
  Two different  mandatory databases? 
  I didn't like the sound of that but continued since I wanted to get done with
  it.
  Database of contacts to the congress.
  http://www.contactingthecongress.org/
  Census Bureau ACS WEB site
  http://www.census.gov/acs/www/
   
  My email input to my representatives...
  I am very angry over the intrusive nature of the Census Bureau's ACS
  American Community Survey required by a select portion of America. 
  I was threatened with punitive action if I did not respond and was
  assigned a case number. I did eventually respond with answers to about half of
  the questions, negative reply to the rest. I think I avoided the punitive
  action.  This is a very intrusive
  and unnecessary survey to be forced on the American population. Every question
  asked is already available through other government agencies using the
  appropriate need to know, the point is there is no need to know. 
  I believe the information taken was done for political purpose only
  and would like this survey to be stopped as a mandatory, punitive, survey.