I don't need any help - just an unfortunate situation I thought I'd share with you guys - because you love this sort of thing.
My father needed to take a domestic flight from Melbourne to Mildura recently, his first flight in over 40 years.
He received an SMS the day before flying advising that he could print-at-home his boarding pass, so he did, and got to the airport 4 hours early just to be sure everything would go smoothly.
After having a wander around he settled into a chair at the gate listed on his boarding pass to wait for the flight.
Shortly before his flight time he was concerned there was nobody else around. He asked at a desk and found out his flight's gate had been changed. He arrived at the new gate in time to see the plane being pushed back.
The airline said that he should have monitored the screens which list flight details. He ended up paying $600 for a seat on the next available flight.
I was pretty pissed off at the airline. I really felt if they could SMS him about a boarding pass then they could SMS him about a gate change. Also it would seem a common courtesy to send someone to the initial gate to check for any less-aware people.