I certainly sympathize with people who want to stop intrusive cellphone usage, but I’m not sure this is the best way to do it.

Let me clarify that. I have a little sympathy for “Andrew”, who blocked a fellow passenger’s cell phone signal just because she was annoying him, but I think he was wrong to do what he did. On the other hand, I have a lot of sympathy for the restaurant owner who wanted to block his staff (and his customers?) from using cell phones in his restaurant.

I have to wonder, though, is jamming the signal the best way to go about it? For private business owners, wouldn’t it be possible (and legal?) to design your business to make cell phones extremely difficult, if not impossible, to use? Would it be against the law to build a giant Faraday cage into the walls of your building? (Would that even stop a cell phone?)