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by uid 5225 days ago
P3P is based on trust. If Facebook and Google don't want to support it then they should ignore it rather than subvert it.
2 comments

True, but apparent "not including the header" gives you strict privacy controls, while "including an invalid header" will set them wide open.

That is a bit strange behaviour on IE's side as well.

Where does P3P allow me to manage this trust relationship you say it's based on?