Being locked up in a detention center for days (and in solitary confinement in at least one recent case) for this sort of violation would have been rare to non-existent.
I crossed the US border many times as a foreigner, although I am now a citizen. The easiest kind of foreigner though - white, anglo, male, middle class. Even those qualifications don't seem like enough to stop the absurd responses from ICE anymore, though.
I get it that US could be nicer, but it was Canada who denied entry first (the girl was coming into Canada after being in the US for weeks prior to that).
I just don't think this has changed due to Trump: I could very well see this happening prior to Trump.
Somebody mentioned how average detainee wait for a court date is 50 days! Trump has not been in power long enough to bring the average that high.
If you've not passed US border control as a foreigner, you really have no idea of what a pleasant experience it... is not.