And when do we finally decide that those principles are worth fighting for? When do we decide that "absolutely nothing you can do" is unacceptable?
Of course you should fight for your principles, but don't do it in a situation where you're guaranteed to lose. To pick a losing fight when there's no attention, no context, and no message, is not martyrdom. Its just dumb.
To create a Rosa Parks moment, it takes a lot of strategy, planning, and cooperation. Not spur-of-the-moment frustration.
Unfortunately, this is a pipe dream. At that point, they can do whatever they want to you. Legally? Probably not. But they can still do it, because there is simply nothing you can do except try to fight or escape physically (which won't work). There's no cops to call, no lawyers to call, absolutely nothing you can do. Unless you value your principles more than your time, or even your safety/life, you will compromise those principles to placate your captors.