The capture of the data is only slightly offensive to me (my library knows a lot about what I like to read, too). Using it to hassle me when traveling is much m

The capture of the data is only slightly offensive to me (my library knows a lot about what I like to read, too). Using it to hassle me when traveling is much more odious, in my mind mainly because there absolutely isn't any kind of data showing that "people who read title X were 10% (or even 1%) more likely to commit some atrocity." That's just nonsensical. So yes, technically easy to implement, but why?