Running thru a checkpoint (DUI or BP) doesn't work out too well down here.
A DPS car usually is posted just past the roadblock ready to pull over an offender.
BTW, DUI checkpoints have been around for some 40 years, as I recall seeing them in Atlantic County New Jersey in 1971.
I'm sure courts have ruled them to be legal. Thank the people in MADD for that.
If you watch the videos, no one runs the checkpoints, they just keep asking if they're being detained until waived through, except in Citizen's video where the motorist goes all evangelical on the agent...
DUI checkpoints were validated in
Michigan v. Sitz which ruled that DUI checkpoints were constitutional under the 4th amendment. the stop is considered a "seizure" however and to keep someone detained past the time it takes to ask brief queries the officers need probable cause to prolong or search
(The Michigan Supreme Court later determined that DUI checkpoints violated Michigan's constitution)
The immigration checks in question here stem from
U.S. v Martinez-Fuerte which validated stops at PERMANENT checkpoints, the scope of the checkpoint is limited to immigration queries and probable cause or consent is needed for a search or prolonged detention. They have no authority to hold you at the checkpoint if there is no probable cause you are an illegal alien.
They tried to put up checkpoints on the Olympic Penninsula in Washington state, and it's funny because after the checkpoint was up for a few weeks they kept calling the Jefferson County sheriff to write citations for blocking the road if people were asserting their rights, or asking if they would assist the BP, and after only a few weeks the Sheriff announced his deputies weren't doing the dirty work for the border patrol anymore that same day the city council of nearby Port Townsend drafted a resolution ordering their city police officers not to assist the border patrol in any way unless it was immediately nessecary to protect human life. shortly thereafter the checkpoints stopped.
Really the border patrol is just a nuissance up there. A friend of mine has a friend (yes I've met both, I know this story to be true) who owns a private airfield on the olympic peninsula, and the border patrol kept driving up his driveway and would park their cars on the airfield and walk around his hangers and check out the junker cars laying on the side of the field, also what's wierd, the border patrol agents on the olympic are monitoring the county sheriff and state patrol dispatch and keep showing up at calls that are traditionally the purview of local law enforcement or state highway patrol. I'm serious, this picture here was who all showed up to a minor accident with no injuries reported, the two guys in black are Sequiem Police Officers, all the people in green are US CBP
and the few towns on the peninsula are all either solidly liberal or pseudo libertarian, it's safe to say few people really want them there.