Well, if it's solved via blockchain, there's an opportunity for speculation among early adopters, which I think is the major selling point for most blockchain "solutions"
Don't normal domains work the same - you pay a fee and you get the domain for X years? In both situations the domains expire and a porn site can nab them.
With normal domains, the registrar can move your domain without your approval.
So they could do so out of malice or because they get tricked into believing you gave them the go or because they got hacked or got ordered to do so by some governmental institution or or or ...