> (I've now come up with scenario: If you have access to multiple such sets of data, you could connect accounts from different systems. I. e. when the youporn logs leak, someone could tie the data to your HN account etc.)

Combine that with leaks of a social network where you have real names and IP addresses, and you could actually identify the name, job, address, etc of everyone who watched a specific clip of porn.

That’s very bad.

Metadata. Not even once.