Cell Phone Usage Banned At Petrol Pumps

[Plus]

Explosion at the gas station because of your mobile phone is extremely unlikely, though it can be real, possibly, though there's little to nothing evidence that it can, and it's largely beyond your control as there are dozens of people with mobile phones on at the station at any given time.

Realistically you can't stop people from turning their phones off in movie theaters, even with the best, most imaginative warnings. It's even more unrealistic to expect people stopping their cars and turning their phones off before entering gas stations.