An other stupid option just flew over my head.
Ask the famous "iranian hackers" to hack 4chan or endchan, copy all its code and databases, and create a clone on iranian servers.
That way it would be even more easy for a community to grow big on iranian servers, because it wouldn't start from zero. And it would be easier for people to migrate there.
This is the reverse of an fbi agent taking control of a website on usa space, why not having the iranians take control of important sites instead?