Well, to remain on track...:
Each summer, we quit for our country cottage. In august, my girlfriend and my son came back in town for a couple of days and the little guy, as usual, played a bit on the computer. The PC feeds my Fisher X-100-2 and the boy know how to use it properly... but sometimes forget to power off.
So, that happened again and the thing was left running idle for a couple of weeks until I came back to Montréal. No harm done!
However, I feel more safe when electronic devices are off when there's nobody home, be it TV, computers, etc...
Patrice