After Valleywag called out Circle, a contact list-bombing social network no one asked for, the company's CEO apologized via bloggy mea culpa, and pledged to be less annoying. Good!

The newest spam-blasting social app shares a name with Dave Eggers' fictional villain-company, and all of its charm. Why do startups—and their big-time backers—think they can get away with molesting your contact list?