https://www.techdirt.com/articles/20190904/13582142921/court-shoots-down-cops-assertion-that-driving-without-breaking-any-laws-is-suspicious.shtml

Must be tough out there for cops. Literally everything is suspicious. And there are only so many hours in the day. Since no court is willing to end the tradition of pretextual stops, anything that can be described as suspicious has been used to initiate fishing expeditions.

A few courts have called out this tendency to view almost everything humans do as indicative of criminal behavior. This is one of the better call-outs, as it gives some indication of just how many "training and experience" assertions the court has had to wade through while dealing with law enforcement assertions about reasonable suspicion.