By way of example - see http://en.wikipedia.org/wiki/User:LuxOfTKGL and
This seems fine. The user is clearly not encouraging anyone to commit crimes. Nor does he admit to any of his own. He wants some laws to be changed but that's not a crime.
This seems fine too and quite similar.
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I don't think we should throw anyone out for what they *are*. If you can show some troubling diffs where these users violate a Wikipedia policy that would be more relevant.
IANAL and IANJ.
Regards, Haukur