For a time, the Cookbook was banned. However, due to most of it being common knowledge, and the rest of it being ineffectual nonsense unlikely to harm anyone, restrictions were relaxed.

In some jurisdictions, however, it does remain banned to this day. YT are liable if they broadcast the contents of the Cookbook to the UK, for example.

Which is a great example of companies acting because they'll end up liable. Which is the only point I've made.