Thanks for the link cgk! First I've seen of this. How are people out there reacting to these billboards?
I'm not even sure if there IS a reaction. The first time I saw one I was at a stoplight, and was actually quite creeped out, like "okay... what do they know that they aren't telling us sheep?". I looked at the cars around me, and noone even noticed it, though it was right ahead of us. I don't watch the local news, but I do read the local paper every day from cover to cover, nothing at all. I've only found mention of them in weblogs.