Using technology to encourage displacement

I just blogged on Petistic (our pet-centered stuff blog with Regine and Fabien) this improbable tool called Pee Post. The point of this tool is to encourage pets to eliminate in a specific area:

This reminds me this mosquito sound generator which aimed at avoiding teenagers loitering: a device that generate an awful mosquito sound to make bad guys go somewhere else.

Why do I blog this? It's another trend in technology: encouraging displacement. This is not really a location-based service but rather, a "go-to-that-location" direction tracker! Even though the underyling idea beneath the 'pee post' is interesting, the mosquito sounds seems to be pretty scary. What's next?