See the problem won't end when they shut down the "extreme" stuff. They are simply going after the "easy" stuff in their minds, the quick wins. Who in government is going to oppose them "doing their job" and getting rid of this "violence" and "extreme perversion"? Once they get this out of the way it does two things: gives them ammo and justification to go futher and provides support (corporal and financial).
Never forget that to them porn in any form is the enemy. Just as they pledge to root out all terrorists they would eliminate pornography in all it's forms if they could just as they would shoot al-queda(??) in the head.
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If at first you don't succeed, then skydiving isn't for you...