Oh the travesty you had to go into your car and flick a switch! must have been such a hardship for you.
People really dont realise all that goes on behind the scenes in these places. With all these threads about having to take a helmet off etc. The rules are there for a reason and not just to inconvenience you.
Lights must be off for a few reasons if you must know.
i) If your lights are on 90% of the time your ignition is on, i know various cars have lights that stay on but you cannot expect an attendant to know that your car does this. If your ignition is on you dont get fuel, its not a policy its a rule as part of the petroleum licence of the petrol station, if you break these rules the licence could get revolked and you wont get fuel there anyway!
ii) If the ignition is on like stated above then the engine could well be running, behind the counters you cannot hear cars so you have to assume the engine is running if the ignition is on. Again this is a clause of the petroleum licence if they didnt they would be breaking their licence and the law.
iii) Drive offs happen with the engine running 90% of the time, with the above assumptions you have to make then you can then assume they may drive off, if they do drive off you loose the cost of the fuel, it then costs time and police time to track down the people. If the car cannot be tracked then the money has to be recouperated somehow and hence the costs go up and the fuel price must rise to compensate.
iv) With the lights on in most cctv cameras this will make the numberplate nion invisible and hence the car is untraceable in the case it drives off.
v) The lights are electric, i dont care what condition your car is in, it can short circuit and cause a spark. I dont know if anyone has ever been in a petrol station when a car catches fire, but i will tell you from personal experience it is not a fun place to be, your average petrol station holds around 40,000 litres of unleaded whilst it is quite hard to light the liquid the vapour is exceptionaly easy to ignite, what is let off while you are fueling? vapour! you can see it! Whilst this is improving with the new vapour recovery systems which have to be in place by next year by law this is not for a fire risk more an enviromental issue so the fire risk still exists.
I have seen cars from brand new renault clios, to bmws, to old classic cars spontaneously combust cause of electrical faults, the last of which was a dashboard fire in a brand new renault clio, which gutted the car in 3 mins due to the fuel vapour around.
All these rules and regulations are in place for your safety, by law there must be signage on the pumps or columns next to them telling you the regulations including lights and ignition off, you chose not to read it or obbey the rules which are there for yours and others safety, quite rightly you didnt get fuel.