Apart from the disruption when the pedestrians coming through gate 2 for Bradford Road then cross in front of all the cars leaving gate 1 - and having had to walk five minutes longer because of those cars and their selfish drivers they will not be in a good mood.
Pedestrians walking in front of moving cars in the car parks are probably drivers heading for their cars. Just stop moving and let them pass. It's an initiative to please drivers complaining about delays. Wait till they get the complaints from the thousands of pissed-off pedestrians, especially if it's pissing down.