Like any technology, like the internet or guns, it can be used for good or ill. The real line of defense to bad tech uses should be at the societal level, with

Like any technology, like the internet or guns, it can be used for good or ill. The real line of defense to bad tech uses should be at the societal level, with a fallback to the legal level. If people want surveillance tech spying on them (to reduce crime, etc) then no amount of legal prohibition or technological safeguards will stop it.