What about the hash of a password cracking binary or the hash of some sort of binary used for piracy or stripping DRM off of something? Or just in general the ability to profile users based on the apps they use seems completely trivial. I imagine it would not take a particularly brilliant data scientist to correlate people who use FTP programs or developer programs or whatever else with people who buy high value items from certain e-commerce sites, for example. Seems like a marketer’s dream if they could ever get access to that. And sure Apple wouldn’t do that, today, on purpose, but are you 100% certain that could never happen? And if there was some way to tie that illegal piracy app binary hash to you personally and the government came knocking with a subpoena, seems like something Apple might be forced to comply with. It’s a very slippery slope.