The rhetorical shift needs to be greater, conjuring up different images than cages and locks. People put locks on things they own, they don't necessarily want to support people who can bypass them. I think things need to go in the direction of "completion" or "empowering"--bad choices themselves but grafting onto that connotation allows you to change the way the argument is structured as well. You are giving yourself a more complete access to your device by jailbreaking, rather than rebelling against an authority.