every single visitor has to sign into a kiosk to enter google. however, you can decline the NDA portion and it prints "nda-declined" on the name badge. this may prevent you from entering some places.
but, i do think you are over reacting about the google kiosk NDA. every visitor signs it. you are not special.
I'm not at all suggesting I'm special at all because I was asked to sign an NDA at the kiosk.
I'm suggesting that founders have a choice when it comes to investors. If I'm asked to accept or decline an NDA before I have a conversation with a VC, I'd rather go to one of the other hundred VC's to talk to in town where that isn't an issue.
a good portion of the information i have ever learned under NDA has been valuable to me in some way, so i would encourage founders to sign NDAs and get the scoop. just don't share what you learn outside your company..
but, i do think you are over reacting about the google kiosk NDA. every visitor signs it. you are not special.