[glitcher]

Yet another daunting issue in our modern world:

No matter how good a given company or product is at privacy-respecting, what happens to all that data if they are bought out by someone else?

[wtbob]

Well, that's the good thing about PIR — with the protocol I discussed, OWS wouldn't have access to one's list of contacts. They'd still know with whom one spoke (anonymising that is a hard problem), but at least they wouldn't know everyone one knows.