Not really, in the way you are using it.
Only in specific edge cases and definitions, which I’m guessing you don’t know. And calling it ‘illegal’ is a stretch in 95% of them. Generally worst case any evidence gathered would just be inadmissible.
After all, even if not a legal stop/detention, that doesn’t mean they committed a crime by doing it.
But tell me, do you think any of these officers would have struggled to come up with probable cause to detain the driver of a giant banana car on a public roadway? Or any other ‘suspicious’ or ‘weird’ vehicle?
Because I can think of at least 3 California vehicle codes off the top of my head that would likely apply, including CVC 26708, 24008.5, and 5201. And I’m not a cop.
And all you need is an articulable and reasonable suspicion to detain.
Stopping someone to chat (aka they can leave without penalty) is a much lower bar, though I doubt they did that.
And you never answered my question.
You've now completely shifted from "unusual behavior is sufficient justification to detain someone and this is necessary for 99% of real traffic stops" to "the police can usually come up with probable cause if they want."
Which I completely agree with. But that's a very different statement.
If a cop saw someone hiding in my bushes at 2AM, that strikes me as reason to think that the person is trespassing if not worse, and would thus justify a further look. It would not be done solely on the basis of "unusual behavior."
Shifted? Not at all. Merely articulated the specific mechanisms.
As you note - my original point stands, and is correct.
It’s difficult to come up with ‘weird’ or ‘suspicious’ behavior that isn’t going to be reasonable suspicion of something, and that is by design.
Or we could just go to disturbing the peace or loitering eh?