This thread is funny.
One, it's dependant on your state. So a thread being read and answered by people all over the country is going to sound silly and possibly pass along bad advice.
Speaking of bad advice, I've seen two posts about Ca and GPS that were wrong. This thread simply points out how little people know.
Can't tell you how many people have told me about the law, only to find out they never read it. Just heard it somewhere.
As for my opinion, I think it's pretty silly to have laws in some states that won't allow GPS up in the window, but it's ok to have an in dash one. Thus taking your eyes completely off the road to view it.