The people you're friends with on Facebook or the people you follow on Twitter are trusted sources of information.
I'm not on Twitter or Facebook and don't even use email. I don't trust computers: one day they'll all break down, and everyone will be knackered.
I use Google+, and I find the quality of the comments are very sophisticated because there is more trust inside of Google+ than there is inside of Twitter and Facebook, for example.
I've stayed away from Twitter for a long time because I sort of didn't trust myself with such an intimate but very public way of relating to the world, but I feel like I've studied it enough.
During the Arab Spring, I learned all sorts of things from Twitter. I wouldn't necessarily trust that information, but it gave me ideas about questions to ask. You can really learn things from the wisdom of crowds.
Trust yourself, you know more than you think you do.
I don't do Twitter because I don't want to talk about myself more than I already have to.
Pasar mucho tiempo en Twitter es insano