Instead of risking losing everything in an all-or-nothing gamble you should bite the bullet and freeze the forums that have caused the most eyebrow raising.
If you have to shutdown the entire Pakistan specific ones for months then so be it. When things cool down you can open them back up.
I'm sure even the die-hards here will agree that's alot better than a complete site shutdown forever.
I have a much better idea. PDF must disallow all garbage including your anti-China topics that you post by the minute on a daily basis. If we ban political banter we disallow ALL political banter. Now that is something I could live with.