in response to posts by people who think it was a stupid question: I'm humbly sorry that i asked a "silly" question. Truth is this is a real concern among many people so take it easy allright? here's a link to a video that seems to really support the idea that these can work. I stated that i wouldn't use it or post anything showing people where it was, but the experts say there is nothing to it and i will trust that they know much more on this than me, it's posted here so maybe they will understand how plausible this looks to someone somewhat newer to all of this.:
http://www.youtube.com/watch?v=KVFJtm7VTys