1) So what?
2) You'll note of course that HN has no user uploaded content, and even comments are regularly moderated.
In practice this means you can't upload anything anywhere safely. Not just to your favourite website, but anything served on your own servers or your home network as well. Imagine the police breaking down your door because a porn bot posted an illegal comment while you were asleep.
> 2)
The moderation of comments actually makes HN responsible for what users type here under certain laws, assuming the moderators fail or choose not to act on illegal content.
If some thread here starts linking and discussing tactics of acquiring child porn then dang needs to act real quick real fast before there's going to be a very unpleasant conversation with some very grumpy police officers, at least in my jurisdiction.
Clearly this is unthinkable on a forum like this, but for any moderator this is a real reason for concern