It is cheaper so it might become more common but from a privacy point of it really isn't that much different. I think the gated property thing is a bit over rated as well since all they would need to do follow you until you stop at a public place and attach it there. Yes people with privacy fences have a greater expectation of privacy behind the fence then people do not have on just like people who park in their garage would have a greater expectation of privacy then people who don’t. Arguing that people can not expect privacy behind a privacy fence because everyone does not have one is like arguing that people should not expect privacy in their home because there are homeless people.

Part of the problem is people see this as being simply a case for the courts. If you oppose then get laws passed to make it illegal.