1. Neither I, or you, or anyone is having to "give up some liberty" because of public cameras. None at all.
2. Hamster on a wheel ? Doesn't make any sense.
3. You may take responsibility for your own safety, but that's not good enough. We're talking about everyone's safety. And you're not even able to take responsibility for your own safety in much more than 51% (most) of the cases.
4. I am not bowing down to anything. I don't even know what you're talking about.
5. You contradicted your second sentence by what you said in your fort sentence. If (as you said) "A camera may help catch the one that hurt you", then yes, it keep me (et al) from being hurt by bad guys who would be (as you said) caught with the camera help, and imprisoned.
6. Cameras can both help police to catch criminals after crimes are commited, and in some cases, prevent crimes from happening. If cameras has been in place at the Boston marathon finish line, the bombers would have been caught the same day of the bombing, and MIT police officer Sean Collier would be alive today.
7. If cameras had been in place at the gas station where Jessica Lynn Heeringa was abducted from, that crime probably never would have occured. If it did, cops would probably have already have solved the case. Instead, they're stumped with no leads. Same thing with the Leila Fowler case (and 1000s of others)