system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why doesn't Tumblr receive child pornography charges even though it's full of nudes of minors?

As many of you know, tumblr's main demographic is  underaged teenage girls. A large portion of their contributions are selfies and nudes. There's many different tags for this, notoriously topless tuesday. With all the jailbait drama that's been going around, surely tumblr would be noticed?
gpt
These sites can't police every single post. If one is brought to their attention they deal with it, but sites like Facebook and Tumblr get literally thousands of posts a minute. Users are generally responsible for the content they post, not the hosting site as long as they've got policies in place to handle inappropriate posts. If you're a 16 year old girl posting nudes to your Tumblr feed you're more likely to get in trouble for than they are.