I worked the Census in 2000. The pay was good, included mileage and daily meetings to turn in the work.
About 75% of homes were easy to do. Then there was that other 25%. I was spit on, threatened with a gun, cussed at, you name it. I ended up quitting because of nightmares I started having after a little old couple pulled me in their home, locked the door, said they were getting their gun and calling the police. I ran!!! They did call the census # I gave them and complained about my tresspassing and haressing them. I was there once before and left a note on the door, that was it!
People that don't like the government take it out on you personally. I did have some towns that were better than others. You are on your own and no one knows where you are specifically. It can be a very stressful job.
There were lots of nice people too. It just wasn't worth dealing with the crazy ones for a job that only lasted a couple of months.
If you do go to people's homes - leave notes at home about where you'll be and messages on the answering machine at home to let family know where you are specifically. You will be going down long dirt roads, pass gates and signs that say no tresspassing. You will be going to the roughest neighborhoods (also the nice ones). I live in southern IL, a peaceful area, so I would hate to see what could happen in the bigger cities.