Their logic is a little fuzzy. They recommend to avoid disconnecting ground pin unless absolutely necessary and in next sentence they say removing this pin is dangerous? Maybe it is only 80% dangerous or perhaps it is dangerous on even Tuesdays and safe other times?
"Do not remove or bypass the ground pin on the end of the AC cord unless absolutely necessary
to reduce hum from ground loops of connected equipment. This may cause RFI (radio frequency
interference) to be induced into your playback setup. Removing or bypassing the ground pin on
any electrical component is potentially dangerous and should be avoided for safety reasons."
"To prevent electric shock, use a 3 prong,
grounded type power cable"
"Do not remove or bypass the ground pin on the end of the AC cord unless absolutely necessary
to reduce hum from ground loops of connected equipment. This may cause RFI (radio frequency
interference) to be induced into your playback setup. Removing or bypassing the ground pin on
any electrical component is potentially dangerous and should be avoided for safety reasons."
"To prevent electric shock, use a 3 prong,
grounded type power cable"