Facebook Causes Stress?

I listened with intent this morning to the BBC's story about the study conducted at Edinburgh Napier University that concluded that Facebook can cause stress for users, and that stress exceeds the social benefits for typical users.

In interviews with almost 200 users, the researchers found the stress comes from concern over rejecting friend requests and other actions that could offend other users. It appears also, that the more time one had spent on Facebook, the greater the stress users feel.