People will avoid the census or lie making census data useless. How will you know if they are lying? Ask for ID? We have all seen how elections have been rigged with this process turning away legitimate voters because social security code to abbreviate a middle name but a passport did not! I moved states and where I use to live accepted my 6 pieces of identity, 4 for me & 2f for residence where the new state did not wanting birth certificate, marriage license & divorce papers. Thank goodness only one marriage!