As others have said, disconnecting the keg will not shoot out all over the place. The poppet in the connector should seal it back up. If you need to release or vent the gas and don't have a PRV on the lid slowly push the gas poppet in with something like a small screwdriver (slowly, so it doesn't spew all over the place if it is really full). You probably already know this from when you bled the keg.
With that said, I agree, don't dump it, wait for a while. Wait a couple months if you can. Or bottle it and wait.
I would say that if you plan to leave it in the Keg, pressurize it before disconnecting it.
On additional note, if the kegerator is out, it should not hurt the beer if it comes to room temperature. But try to keep it in a cool place.