I was reading Chris Brogan’s Blog — always highly recommended — and one of his recent posts, Quid Pro No, got me thinking about how some social networking websites are un-naturally inflating their user numbers by creating an environment where reciprocal friending is de rigueur. Everything from address scraping to spammy auto-tweeting when your friends sign up, to old-fashioned guilt is used to get you to sign-up for sites you never intend to visit again.