[zkinion]

There's always the typical examples: myspace with a hardcore spamming operation, facebook with beacon and some minor spamming/data theft in the beginning, youtube - pirated content. Ebaum's world - totally stolen content.

Those are obviously the biggest, most well known. Beneath the surface, a ton of companies are doing similar things, at a lesser level, but it often goes unseen. Many cams and dating sites started out spamming and fake profiles/female profiles. Most startups that require a "network effect" often create a lot of fake users at the start.