because those of us who reached the head of the queue before your pal who's way at the back of the queue now have to wander aimlessly about holding a tray with food or drink on it that's now getting cold, because we CAN'T GET A BLARDY TABLE because they're all full of people holding seats for their pals in the queue.
ARGHHHHHH....
Actually, IMNBU at all. I'm being perfectly reasonable (and probably a bit of PMT involved here, granted), but does this wind anyone else up, or shall I just go and have a wee lie down?