Sometimes, DNS will break for me (someone's DNS server will get hit by a DDOS, say), and I'll add the appropriate records to my /etc/hosts to work around it. I

Sometimes, DNS will break for me (someone's DNS server will get hit by a DDOS, say), and I'll add the appropriate records to my /etc/hosts to work around it. I may not notice that I've done this until several years later when it stops working because their IP address changed.