In Dad's Army, Captain Mainwaring's famous line, "You stupid boy," was originally written as "You f***ing tw*t, Pike," and was only changed at the very last minute after concerns were raised among BBC bosses.
If a meteorite the size of a house brick were to strike Loch Ness, all life within the Loch would be ended and thus conclusive proof of the exictence or otherwise of Nessis would be garnered.