Any idea if and how this ruling (if upheld) can be used to refuse phone seizures / password requests by CBP when entering the country? The ruling relies on the 5th amendment so its scope is limited to American citizens I guess. And whatever the rule of law it’s probably not a good idea to piss off a CBP agent... but still, it’d be nice to be able to travel to the US without having to wipe one’s phone and social media…
I highly doubt it, even for American citizens at the border. The "Border search exception" pretty much says that anywhere within 100 miles of a boarder, the fourth amendment doesn't apply[1]. I imagine they would make a similar rule for the fifth amendment. [1] https://en.wikipedia.org/wiki/Border_search_exception
Non-citizen admittance is at the discretion of the immigration officer and they can turn you away for just about any reason.
Either way, yes, this ruling wouldn’t change anything there.