[RetiredArmy]

The police can stop you at these check points, however, if you have no outstanding warrants to cause them to do anything further, they have no right to search your vehicle for anything. If they ask, you have a right to say no. Oh, they will threaten to get a warrant, but you should call the bluff and say, okay, where do I park while you try to convince a judge your theory for reasonable cause to search my vehicle.

[Fury]

You write:

"If they ask, you have a right to say no. Oh, they will threaten to get a warrant, but you should call the bluff and say, okay, where do I park while you try to convince a judge your theory for reasonable cause to search my vehicle."

I believe this is the right approach. I cannot think of a reason that I would consent to a search of my house or vehicle, etc.

It's sometimes not easy to say no (e.g. see http://www.freerepublic.com/focus/f-news/560568/posts ) but it's not unreasonable to say no to a consent to search.