Huh....interesting article I came across about those invisible dog fences..... http://www.washingtonpost.com/wp-dyn/content/article/2008/01/25/AR2008012503318.html?wpisrc=_rssprint It would freak me out if I was walking my dog and I see a big ole huge Rottweiler running toward me. As it is in my neighborhood I usually carry mace because some people still don't get the idea of keeping their pets on a leash (or building a fence). The other issue I have (well I have 2 more) is the use of electric fences for your dog? Humane or not? I purposely didn't buy a house 2 years ago because it had one of these. I thought it was so cruel!!! The final issue, what is wrong with subdivisions nowadays that we can't have fences??? It is my property and if I want it to be private so no one can look at me when I'm BBQing or having friends over, can't I do that? Here in Indiana there are subdivisions starting to do this....and we thought it was insanity. This could come from living in CA where people had 8 ft. tall brick walls around their houses LOL. But seriously, I tolerate children on my good days and it ticks me off that they run across my front yard....I couldn't imagine if they could run all over my back yard! There are also times when I want to enjoy my property and not have to talk to my neighbors and stuff....without a fence they'd always be able to see me!!!