I think I'll avoid this problem by staying away from ultraviolet lighting.
Bottled water? Hell, we bought pet rocks, didn't we?
Heck, George Dubya was ahead of his time! He spent a fortune to protect Americans from non-existent threats more than a decade ago...
Back in the late 80s, there was a rather amusing book acquired by the library where I worked that talked about all the dirt and filth and germs and creepy-crawlies all around us that weren't really cleaned but just kind of pushed around and around by all of our housecleaning methods. Can't remember the title or the author now, but the staff had many happy moments grossing each other out with various passages. The chapter on dust mites was fascinating.
As for stupid Americans paying money for crap: For some reason, I immediately thought of people dumping their change into Coinstar machines in the supermarket, which then gives them back, IIRC, 93 cents on the dollar. I actually saw a woman doing that the other night. Coinstar has become a large, profitable company from that business (although they do have Redbox as well). I'm really having trouble thinking of any "comsumer" behavior stupider than that.