They are only limiting if you don't know how to code them in a compliant way in the first place. Everything you can put on a page can be made compliant without losing functionality.
Back on topic - I've heard people say that one of Google's mottos is "Don't be evil". I wonder if that necessarily implies "Be Good".
Hey, with the 100+ factors considered by their results algoithms it could potentially be a (very minor) scorer already.