Comment 80 for bug 969489

> I have not seen data that proves it has 0 bad effects. I'd suspect that
> it would have a minor impact on time between power-on and login for
> those users who are not affected, but I also have no data on that either.

Sorry... say what!? I will just quote it for you, from canonical's upstart documentation:
http://upstart.ubuntu.com/cookbook/#respawn
"6.26 respawn
Without this stanza, a job that exits quietly transitions into the stop/waiting state, no matter how it exited.
With this stanza, whenever the main script/exec exits, without the goal of the job having been changed to stop, the job will be started again."

So please don't make up suppositions and compare them to facts.