Interesting, this is my first visit to this website and I just had a census worker come to my door 2 days ago.
I don't have a mailbox or an address so she was pretty upset that I didn't have one to give her but if you don't you don't.
I told her she might want to take a look at my "No Trespass" sign as she leaves and she said that the federal government told her she could come on my property.

Anyway, my husband teachs at a college and he has a student that is a census worker and the guy told him that he would not have gone on my property with my particular sign (apparently she didn't see it as it has rained a lot here and it was sort of falling over).

I'm saying this because if you have just a regular "No Trespassing" sign up it means nothing to them. It has to read "No TRESPASS" and it has to have the land use information on it. They will honor that sign. I live out in the boon docks where a lot of people grow their own marijuana, etc and I get cop cars all the time coming out here asking about people and even had one guy that ended up being wanted with a warrant and his trailer was being stored on my property and they never did come and talk to me or anything even though everyone knew I was a friend of his so I had assumed that it was because of the sign.

Of course, no sign will matter if people are fascist pigs and believe they can do what they want no matter what you want.
This lady seemed to believe that the federal government would not lie and tell her she could do something that was unlawful. I'm wondering if they told her it was OK to shoot me if I did not let her on the property would she have shot me?

I'm thinking yes.

Remember about having the proper sign if you want a leg to stand on.