The point is, by the time a request has been submitted, received and acted on, the content has probably already expired and disappeared. Everything is temporary there. I can't see much actual censorship resulting from any of this. The memory of 4chan is not on the website, it's in the dark corners of its users' hard disks, where no censorship reaches. Enforce takedowns as much as you like, but once an image expires or is taken down someone else will post it, probably under a different name or with a silly face photoshopped in, and so the cycle continues.