And yet you don't take the "freedom" argument to its final conclusion, which is that you must grant Freedom -1. That's the freedom for anyone, anywhere, to run any software on your hardware, at any time and for any purpose.
And this is only half-joking: all access restrictions, even ones as basic as filesystem permissions, impinge on freedom in some fashion. You can work around them, of course, but you can work around Firefox's extension signing (and Apple's app signing, and lots and lots of other systems that people insist are objectively reducing "freedom"). Which means that to be consistent, you either have to be against even those basic access-control mechanisms, or you have to compromise on absolute "freedom" and begin arguing about how difficult or complex a workaround can be before you personally would rule out allowing a system to require it.
And I really dislike the "can be socially engineered around" buldgeon. If taken to its final conclusion you would have to lock-down systems and give users no freedoms at all because they could be convinced to do something bad with enough effort.