[pkorzeniewski]

Beside the privacy concerns, it's sad that most people feel the need to share every little detail of their life with everyone, 24/7. What's the point?

[spindritf]

Branding (signalling). Same reason people post pictures of their desserts with the restaurant's name, announce party affiliation, and tell you about a band you have never heard.

[bluthru]

For some reason, many people form an identity from what they consume.

[minikites]

Why talk to anyone unless you think you can get something from them?