*For a concrete example, all of your scripts that automatically ssh into a server, start a process with screen, and log out, now break. To name just one thing that I have done on numerous occasions.
Hey, if i understand the way logind works, if you login as root and run the process under screen, it won't kill the process when you logout!
An easy work-around that doesn't require configuration file changes!
Sure *some people* will complain that it's a risk, but hey, it gets you moving forward again and you can close that ticket.