“ I’m not sold just because we connected. If I’ve “friended” you on Facebook, that’s not when to pitch me. If I’ve followed you on Twitter, that’s not when to auto-tweet me a direct message about your blog. If I’ve come to your blog, don’t overlay a big fat ad pushing me into your sales funnel. In relationship terms, I’m reaching out to shake your hand and you’re trying to put your tongue in my mouth.”
Source: chrisbrogan.com