If they could they would, they can but don't.
Code:
http://www.icann.org/
Please read that site, as it will inform you who has control and the aims which cause trouble spreading 'Internal" fear. It's in their interest's to spread fear, not close channels of fear...and that's the PTB role no more no less.
As anyone in this area will know ipv6 has met some crit, although I have had some phone calls through ipv6
All in all if you are worried about losing info get hold of web page ripping software and save all videos you watch.. even better make friends interested in this area
All the best