Sounds to me like the "spam" you are complaining about is a communications service for your friends. No lawsuit there, unless every email you get from your friends but didn't ask for is also considered spam.
Would an invite to gmail by a friend be considered spam?
Nor is this "data scrapping[sic]" you mention anything of the sort if your friends deliberately requested, or passively acquiesced, to Facebook reading their address books.
How about a class action lawsuit for unsolicited spam and data scrapping?
Much longer to wait for results but much more satisfying.