Reading this thread with some joy but I'm sure the main reason why they don't like you sitting on your bike while filling it up with petrol is exactly the reason Scotty said. The danger is slipping and falling over with a open petrol cap and possible nozzle pumping fuel if the trigger gets caught open. Makes perfect sense to me. I use the centre stand when filling. simples. (Why they don't fit centre stands to many bikes nowadays seems just silly but that's another topic?)
Has for removing your helmet because of security,,, surely it will only be a problem after you pull a gun instead of a debit card??? I never take mine off and if I get asked to I'll use Snowy's get out of the card only works with the helmet on. If it's good enough for Muslims it's good enough for me. ;D ;D