Drivers at drunken-driving checkpoints don't have to speak to police or even roll down their windows.
They just have to place their license and registration on the glass, along with a note saying they have no comment, won't permit a search and want a lawyer.
At least, that's the controversial view of a South Florida attorney.
Warren Redlich contends the commonly-used checkpoints violate drivers' constitutional rights.
He and an associate have created a website detailing their tactics.
Scroll down for link and video
They've even made videos, one viewed more than 2.4 million times on the Internet, of their refusals to interact with police.