A minibus worth of sleeper passengers had to be specially ferried from OOC to Padd once when I was working at the Oak. They were not amused. Punters at Padd diving onto ECS HSTs or LHCS at the last minute, thinking it was a passenger train, used to appear at the Oak too. They were put on the half hourly Train Crew workabus and if the experience of arriving at the Oak wasn't traumatic enough, a hair raising ride down Westway in the Sherpa with Sidesaddle or his mates at the wheel would certainly press the point home!
Punters occasionally used to turn up at Ferme Park when I was on the GN too.
Late users of the train lavvy sometimes also used to get caught out when EMU stock was on short turn round and they had to be escorted from HX EMU to the station.
It's not as common now as it used to be!