Social Media Marketing

I know two people on facebook and just a couple more on myspace, neither of which are as active in the political forums as I am. Why do they think that teenagers and young adults are the accurate demorgraphic of the political polling arena?

When I take a picture from my iPhone and want to post it on my twitter, I have to post them through TwitPic. The picture always ends up being sideways, and no, I am not taking the pictures sideways from my iPhone.

I am following several people on twitter, do they need to be following me as well, to see my posts?