I don't understand what you are arguing. If Twitter also break UK law, they are still both breaking UK law. Only Klout also actively creates an account for you and attempts to collect information on every move you make.
Admittedly, I went about it in a ham-handed manner (I blame the Monday), but my core point is this: Klout is doing nothing differently evil with your data, than any other social network. No laws are being broken because [Klout says] no PII is being sold willy-nilly.
There's a comment over on the post that nails exactly what I'm trying to say, and in a much better way: http://www.antipope.org/charlie/blog-static/2011/11/evil-soc...