Just looked at CGwatcher but it's dead in the water.
The software i am am pointing you at is CGRemote.
CGwatcher is a watchdog program for a localhost miner so not exactly what you want.
But CGRemote is a paid software, also i'm a bit surprised you're saying Cryptoglance does not have a remote shutdown command. Anyways i tried cgremote and it mostly worked (not very will with the S1's) but it is (or was) paid software
With TeamViewer, you can connect to your miners as if you were there locally and enter the kill cgminer command in terminal. So if your miners are overheating or whatever, the miner software will stop, so the controller will idle(power down the chips) until you tell it to restart mining or reboot it.