Nothing will happen. The same thing happened regularly end of last season when they were down to 2-3 trains per hour. Everyone just stood nicely in a queue and grumbled
Yeah, but at least the trains were actually stopping at Falmer then and you knew you'd get there at some stage. I was more worried about the 'safety implications' of thousands of disgruntled punters being told, "Sorry there are no trains to Falmer AT ALL. Please leave the station and seek alternative means of transport, and yes you're right, we don't give a shit"