By my reckoning, I've had this happen 10 times in my career. Usually, it was the fire alarm going off at the Hilton in Glasgow before the Old Firm.
I'm sure those Rangers fans got a good chuckle out of Celtic's striker standing outside in his dressing gown in the wee hours, waiting to be let back in. Does it have the desired effect on the players? Not really.
If anything, it can have the opposite. As if you weren't already motivated enough to win, now you're thinking, 'Sod this, if they're trying to mess with us, let's make sure we mess them up'.