If there’s a way to circumvent something that the police (or anyone, for that matter) don’t like, they’re going to find a way. Black tape. “The battery died”. “Didn’t realize it was off”. “Knocked it loose and it was too risky to bend down and get it until after they ran into my fist”, and so forth.
If the only option for keeping them clean has to be technological, I recommend following them around with drones…
Um, are there bulletproof drones yet?