I must say one must stop reading and replying when I come home from the pub!!
Interesting that we all seem to get confused that the origional comment was on Nose Landing Gear Pins (NLG) and we all go straight on to Depressure Pins?
Most aircraft that I have pushed back always have the depressure pin / torque link disconnected or the CB pulled. This covers most types of aircraft.
As for NLG for push back only the SAAB's use both and are handed back to the flt deck via the hatch.
Towing, all pins are fitted from flt deck and TECH LOGGED.