Venice: In reply to your question "What's it called when they scan your bag and then ask if they can go through it?"
That's called a rhetorical question, or perhaps coercion, because if you want to fly there can be only one answer from you.
Remember, the TSA definition of public frisking is not an insinuation that you are a damned lying terrorist.

Ah, no.

Their definition is "Dignity and respect." It is a PLEDGE, from them to you. Enjoy those cattle pens, sweetie.