Quote Originally Posted by CorbinFisher_BD

In theory, they could go about busting illegal after illegal but once they searched and demanded ID from one single legal resident/citizen out of suspicion solely based upon their having assembled to protest - as the Constitution guarantees them the right to do - they have violated that individual's rights.
Without intending to hijack the thread, under the a similar theory to what you describe, I've always wondered why the Feds are allowed to post people on I-5 50 miles north of San Diego as an "immigration checkpoint" for drivers headed northbound. Near as I can tell, the deal is you slow down, the Feds look in your car, and if you don't look Mexican, they let you pass. And if you do, they stop and ask you for ID and so forth. Seems to me that's unconstitutional, since they're targeting people based on appearance instead of any legitimate reason to think the person might be a non-citizen. Anybody from southern california (or elsewhere) know how they get away with this?