I'm seeing people asking their #instance admins to ask the Internet Archive to not archive the instance's toots in the #WaybackMachine. This is a good idea, and prudent, considering the privacy-leaning nature of the #fediverse. Even the big social platforms don't archive there.
I, for one, would petition that you do that for writing.exchange.
I've done this before. Write to this address: email@example.com. They'll confirm via email within 7-10 days.
You just ask them to block the domain and prove you're the owner by sending the request email from an address on the domain. That's the easiest way.
@wion Thanks, this is great input, and something I can agree with. I'll poll the community just to be sure.