There was a story on Drudge yesterday about a case in HI, where a census worker tried to "get tough" with a resident and refused to leave when asked. Well he didn't realize the guy he was trying to intimidate was a deputy sheriff, who had him arrested and charged with trespassing.
Here is a link to the story:
www.westhawaiitoday.com/articles/2010/05/29/local/local02.txt