I agree the answer is likely both. However, one important thing to note is that the 'people who genuinely care about stoping child exploitation' really want to ensure that it is only used for preventing child exploitation and not by 'groups who only want a plausible excuse to violate people's privacy'. I am against the false dichotomy of protect children or preserve privacy; I truly believe, and have good reason to believe, that both can be accomplished together with care, thought, and trust.