Yes, sure. But I think people are missing something. First, no one, I think, goes to Tumblr to look at Michelangelo. There are web sites from all of the great museums for that. And to censor some images is NOT tyranny or any of the foolish things some posters are saying.
The bottom line is this: There are laws against kiddie porn, laws which I agree with and I think (hope) most people here agree with, because those images, as opposed to stories or computer renders are created from a real child being exploited. Keeping those images off a site with millions of users is not a trivial task. Algorithms can't do it and even humans have a hard time when dealing with a volume of posts orders of magnitude greater than those on CF. What would YOU do if you were CEO of a very large web site? IMO, the blame lies with those who posted the images, not with those forced to deal with the problem.