When you enabled Find My Mac on Lion or ML, it creates a guest account for you.
In Lion clicking on the guest account would restart the computer into a Safari only mode.
In Mountain Lion the guest account is traditional account except the user's data is deleted when they log out.
What was the point in the Lion guest account, I heard something to do with helping to locate the Mac if you lose it, but I don't understand how having a guest account enabled and not normally in use helps? If someone finds a Mac, and happens not to steal it, how would logging into the guest account help? It seems like this is a very small use case, and not really enough to warrant having the feature, so I'm sure I'm missing something?
Why is Mountain Lion's guest account enabled when you enable iCloud/Find My Mac? What is the connection between them?
I can't see any reason to keep the guest account enabled on Mountain Lion?