Bob Barr, the 2008 Libertarian nominee for president, and keynote speaker at the 2010 Libertarian National Convention this weekend in St. Louis, writes in the Atlanta Journal-Constitution about the possibility of privacy intrusions by census workers:
What many Americans don’t realize, is that census workers — from the head of the Bureau and the Secretary of Commerce (its parent agency) down to the lowliest and newest Census employee — are empowered under federal law to actually demand access to any apartment or any other type of home or room that is rented out, in order to count persons in the abode and for “the collection of statistics.” If the landlord of such apartment or other leased premises refuses to grant the government worker access to your living quarters, whether you are present or not, the landlord can be fined $500.00.
In March, the Libertarian Party issued this press release about the census.