That's fascinating!
Some sites have previously returned HTTP 404 (Not Found) or similar if they are not legally permitted to disclose that the resource has been removed. Such a tactic is used in the United Kingdom by some internet service providers utilising the Internet Watch Foundation blacklist, returning a 404 message or another error message instead of showing a message indicating the site is blocked.[4][5]
https://en.wikipedia.org/wiki/HTTP_451
I wonder how 'the authorities' will try and deal with dtube, and other services which use IPFS.