Mike Loukides disparages automatic sharing functions, such as an add-on that tells your friends every song you're listening to on Spotify:
If you want to tell me what you listen to, I care. But if it's just a feed in some social application that's constantly updated without your volition, why do I care? It's just another form of spam, particularly if I'm also receiving thousands of updates every day from hundreds of other friends.
Nick Carr agrees:
Intimacy without distance is not intimacy, and sharing without friction is not sharing. Qualities of tenderness become, in the end, forms of commerce.
The Dish 