> sometimes it's best not to collect it, just because you don't know how it'll be [mis-]used An example where this has happened: Some (many?) U.S. public libra

> sometimes it's best not to collect it, just because you don't know how it'll be [mis-]used An example where this has happened: Some (many?) U.S. public libraries have stopped storing historic checkout data for patrons, in order to avoid having to turn the data over to a govt. agency. I recall being able to get a list of every book I had ever checked out. Not any more.