Except from your link:
” Title 13 U.S.C., Section 221, makes it a misdemeanor to refuse or willfully neglect to complete the questionnaire or answer questions posed by census takers and imposes a fine of not more than $100. This fine is changed by the Sentencing Reform Act of 1984 from $100 to not more than $5,000.
The Census Bureau is not a prosecuting agency. Failure to provide information is not likely to result in a fine. The Census Bureau staff work to achieve cooperation and high response rates by helping the public understand that responding to the ACS is a matter of civic responsibility, and prefers to encourage participation in this manner rather than prosecution.”
They mean that it didn’t used to be a prosecuting agency... It was recently moved under the White House umbrella...
They would have to find a US attorney who would prosecute this.
Just so you know, the threshold for most prosecutions starts at $10,000. for injury.
They won;t touch cases that don’t involve less than that.
To prosecute a civilian for refusing to answer more than name, number and ages of people in the house is pretty slim I would think.