Just another reason to always, always claim your own domain. If you rely on someone else's domain, you have no control over it.

Although it must be said: even your own registered domain can be lost. Generally due to you not paying attention, but I believe it has also happened that a registrar fucked up and sold a customer's domain to someone else.

Maybe we need better regulation for this sort of thing. If you get a new phone subscription with a different phone provider, the phone providers are required (in the EU at least) to allow you to keep your phone number, because so many things are tied to it. The same is true for email addresses and websites. Breaking this can cause serious problems to people.