Read this a while back would highly recommend, explores what people do online when we think no one’s watching (beyond, stalk, scroll and look up recipes that is). It covers how what we do with people we know online and offline can differ immensely and what happens when those worlds intersect.
If you’ve read it I’d be lying if I didn’t add that PI.FYI reminded me of PORK somewhat and the old music sharing message boards of the early internet days