Yeah, the main stand catering is a riot.
There is no particular/obvious queueing method either.
They should either:
Reopen the kiosk downstairs to relieve pressure
Or
Route the queue down the stairs towards the exit - Not sure if this is prohibited by safety though. Perhaps the stairs need clearance, but the stairs into the bucket seats at the north end are usually swamped anyway.
Also, it is not difficult to put a sign up as/when they run out of pies.