I know that in our area, it is difficult to find any place to put them but on MDOC land, or Jackson County Parks and recreation land (like Flemming lake, Blue Springs Lake, and Blue and Gray Park.)
I am going with the don't ask don't tell. I have picked out six caches within 10 miles of my home and have found that four of them were on MDOC or JCP&R parks. What was really cool, is that it took to me to parts of the park that I have never been to before, and saw features I never would have, if it were not for Geocaching.