I’m not even a cop-centric hate-site, but if I were looking to attack this, I’d try flooding the camera with innocuous content.
I don’t know what the storage limits are on a body camera, but my (naive?) assumption is that the reason why it doesn’t just record and keep footage 24/7 is because it would run into storage limitations. If I’ve got two hours of must-not-erase storage capability, all I have to do is make sure that gets filled before I do anything objectionable.