The host can still mine data. It doesn't know the content of the data itself, but it knows who's looking at whose data, and what IPs they're coming from and wh

The host can still mine data. It doesn't know the content of the data itself, but it knows who's looking at whose data, and what IPs they're coming from and what browser fingerprint they have. The only thing you're protecting against is the accidental release of customer data. You'd be better off programming the server in some theorem-proving language that proves sensitive data isn't leaked. What you end up with is a slow, unintelligent website, with fewer features and untargeted advertising that can't recommend friends. It can't do anything useful that social networking butterflies are interested in, and it's one that people who use secure services because it's fun to be paranoid aren't interested in either, because it's not actually secure, and it's a site that's more expensive to run and more complicated. Don't do it.