Manipulating rates to shaft the consumer seems pretty predatory?
No. It's bad, but it isn't predatory. Predation involves consuming your victim. Asset strippers do/ did that all the time: buying up companies to get their land banks, or their patents, or whatever, and selling the rest of the assets off after sacking the workforce. That's a predator, and heinous as some of the bank behaviour has been, they don't behave like that.