Earlier quoted context omitted.
>Carrying no devices Is this article seriously suggesting i can't travel without a device or can't wipe before i go, because these CBP guys are so easily triggered?
yes, both could be triggers
The CBP actions and incidents as described by first hand accounts do not seem to define an institutional directive guiding the decisions as to who warrants further investigation, and more importantly, who warrants having their entry denied. From the article earlier today on Henry Rousso's experience, the Immigration Lawyer that helped secure Dr. Rousso's release suggested that agents themselves are looking for reasons to deny entry rather than reasons to admit. [1]
This isn't to excuse their behavior - it's deplorable, but to suggest there is a rhyme or reason to what's happening isn't really sensible. The issues is emboldened agents abusing power, not an institutional directive.
Quite honestly, travelers worried about drawing the ire of the CBP don't have many reassurances right now since you're not looking for what makes you suspicious or unsuspicious to the CBP, you're trying to guess what makes you suspicious or not suspicious to the individual agent you're reaching.
The agents' attitude absolutely needs to be checked and unfortunately this likely means there will be more of these cases until something institutional is sent down to curb the behavior.
[1] https://mobile.nytimes.com/2017/02/26/us/french-historian-de...