Curtailed? I can personally confirm that as of just a few years ago, all vehicles passing various roadblocks in southern Arizona and New Mexico (including one across an entire interstate) are stopped and questioned. I assume this continues today.
Did those check points match the ACLU description or were they more like a temporary border stop?
Prior to that second case, the border patrol asserted the right to make random stops because they suspected someone in the car was Mexican. The Supreme Court decided they couldn't do that, but they are careful to say that the decision doesn't apply to the border and "functional equivalents".
The validity of checkpoints has been upheld as long as they stop all cars and only look in the windows and ask for license/registration. It's used everywhere for DUI policing, not just immigration checks.
Doesn't mean it's not shitty, just that it's a different matter than border searches.
