Don’t be stupid about this. Asking to use facilities is fine.
It’s the refusal to leave when told to, to the point of defying a justified personalized police order to do so and requiring ARREST to compel removal from premises.
If anything, the lesson learned here is to (A) be a customer when facilities are for “customers only”, and (B) GTFO when police tell you to vacate private property.
No, the lesson they are learning is outrage can be induced and people fired for doing their jobs, and you get to appear on Good Morning America.