> We allow you to drive on the public roads, in exchange for you giving up your driving privacy. This is why cops can stop you and give you a breathalyzer at will, because that's the trade-off you agreed to when you got your driver's license.

Uh-huh...

It's been a long time so perhaps I missed the part where I signed away my constitutional protections in exchange for my privilege to operate a motorized vehicle.

Unless by "at will" you mean "under reasonable suspicion" and/or "with probable cause"?

Yet again you people make me sad...