These younguns need to learn to respect signage and follow directions of duly sworn bank employees. Whipper snappers I tell ya. :-)
Does anyone remember Wayne LaPierre’s NRA fund-raising letter slamming federal agents as “armed terrorists dressed in Ninja black ... jack-booted thugs armed to the teeth who break down doors, open fire with automatic weapons and kill law-abiding citizens.”
When you are asked to leave, regardless of it being from private or public property, you become a trespasser if you do not leave immediately.
You don’t get a “time out” during which you can rant. You leave.
In this state, and I suppose most are similar, the person in charge of the property may take reasonable force to remove you.. a dangerous move.
So in this case the cops had the right and the duty to remove her.
Now whether they were too rough is an entirely different question and not resolvable by anyone not present.