I'm find some links which give messages like: Firefox can't find the server at xxx.xxxx.xxx. I check whether it is down for me or everybody and "It's not just you!". Should I edit such questions or answers to make it clear the links are dead? What if they come back to life? I'm not sure my question is duplicate of https://meta.askubuntu.com/questions/2229/what-should-we-do-about-answers-with-link-rot because that is for "link only" answers and the link dies.