Every once and a while I see stories about a site being hacked, but it turns out that the domain registration just expired and someone else grabbed the domain and redirected DNS. I've also been to sites with invalid SSL certificates that have expired.
So... question is, how do you keep track of these registrations (that may be paid for for years at a time?) so that they can be renewed in a timely manner? Most registrars will send reminder e-mails when renewal time is coming up, but that doesn't help if they are sent to an admin that left the company a year ago.
Just curious...