Yeah, I thought that this line: > "They know everything we click and like on their site, and know who our closest friends and relationships are." was actually

Yeah, I thought that this line: > "They know everything we click and like on their site, and know who our closest friends and relationships are." was actually a big understatement - due to the ubiquity of the share button, which (as many HN readers know, but many average internet users do not) tracks logged in (edit: and also logged out) users, they also know a decent approximation of everything, done by everyone across the entire internet. Now, it may be ironic, but it might also be poetic justice if something being shared over Facebook ultimately weakened it. Imagine a virally-shared post encouraging people to take a deletion pledge in 5 days by sharing it. They could use the intervening 5 days to get contact information, and establish what kind of relationship they'd like to have with the people they actually care about on there.