Right, because being forced to take off one's hat is a similar assault on one's liberty to having a dagger put through one's chest if one gets in an accident.

As incursions on freedom go, no hats/sunglasses in a bank is a rounding error compared to things we all have to do each and every day. 10 items or less in the express lane. Don't park in the handicapped space unless you have a pass. Only vehicles with two or more persons in the HOV lane. And on and on.

By textbook definition, each of these infringes upon our liberty in a measurable way, but most of us submit to these restrictions for the greater good. In this case, the greater good is the possibility of a reduction in robberies, which logically follows from the fact that less ability to obscure one's face makes them easier to pick up on the surveillance cameras.

I just don't see the big deal.