Part of the point of objecting to big data surveillance is that we ultimately don't know how it's being used, despite what companies claim about its use. Can I

Part of the point of objecting to big data surveillance is that we ultimately don't know how it's being used, despite what companies claim about its use. Can I believe you? ...even if you're telling the truth, big corps can hide their most malicious practices from most of their own employees. To me, it doesn't matter how e.g. Facebook actually uses my data today, because even if they're telling the truth they could change their policies tomorrow, or get hacked, or some third party (incl. the gov't) could get hacked, etc. It's better as a user to try and prevent such data from ever existing in the first place.