I have a naive and maybe stoopid question : If ITU wants to grab the authority that IANA has now, how the hell are they going to enforce it ?
Root servers are not going to magically change overnight, and people in the US and Europe are certainly not going to switch to whatever the ITU decides, just because the ITU decides.
It would be nice for the ITU to remember that the Internet works because everybody agrees with it. If people start to disagree, it will only lead to a split in the internet, and I'm pretty sure the ITU fork will not be the winner, given the history of the slug.
Which makes the whole ban thing even more stupid as it will impact performance as well as security.
If you do something right once, someone will ask you to do it again.