These are the days you don't know whether to laugh or cry at it all.
NOTICE TO ALL PASSENGERS
Please do not run on the platforms or concourses. Especially if you are carrying a rucksack, wearing a big coat, or look a bit foreign. This notice is for your own safety.
UPDATE: Reader henry points to this image which rather convincingly suggests this is indeed a fake. You can read through the comments for my thoughts about that. In the end, though, it's still sadly funny.