Glad to see I'm not the only one doing this. It definitely leads to a lot of small talk about my email domain, but I've never run into a situation yet where I couldn't sign up for something. My personal favorite is when reluctantly providing an email for something I don't care about I can spout out something like "blockthishottrash@mydomain.tld". That's lead to some fun reactions.
From my understanding, this is caused by the universe itself expanding between the 2 objects, not that the object itself is moving that speed relative to us. It's still completely insane to think about, either way.