Since you're commenting about some random person that you noticed in a gas station, should I remind people here, that not everyone that drives an M3 (or any performance car), are car fanatics. Some people are just cheap or simply don't give a damn about their cars!
I know a guy that make millions a year, yet refuses to pay an $80/month private garage parking at his workplace. This person was happy parking his new Porsche 911 Turbo on the street for $0, and walking 4 blocks. This same person also criticized me one day for popping my M3's hood and showing the engine to a coworker. He just couldn't understand why I cared so much for a stupid car.