1. If this is true, whatever mechanism the loneliness uses to spread is probably also the cue for some people to disengage. You know, when things get kinda rough and you talk to people, they sort of pull back a little, as if you don't have as much to offer. They somehow know something's up...probably from a slew of very subtle nonverbal cues.<p>2. I've often felt that Facebook creates more loneliness because it encourages a sort of fake, communal happiness. People generally want to put their best foot forward since their thoughts are broadcast immediately to everyone. And if someone deviates from this often enough they're shunned. I really don't know what the solution is, other than to not use Facebook. It's almost like FB has a spiritual 'cost' associated with it.