Gah!

I remember reading about that GPS case (or something very similar) a few months ago. That the French have such restrictions doesn't suprize me, although last time I was in France there was no shortage of frightening drivers, so it doesn't seem to be helping much.

The major difference in the Acme rental case is that it's not a government entity in any way, although I don't think their level of disclosure was sufficient (nor their argument that it's accepted practice). Had their client been suitably informed he would have had the option to take his business elsewhere.
I read an article yesterday (in a GPS trade mag which I receive for no good reason) about certain defective UHF/VHF marine TV antennas that were knocking out/overwhelming GPS signals for a mile in every direction. This was in a harbor in California IIRC.

-Zeke