Here's a story of my own.....a few months ago in an indoor supermarket parking lot, I was parking with my friend with his m3. He had hfc's on his m3, no secondary cats, no resonators, and remus race mufflers. We parked and then an old man walking by with his walker (prob ~85 yrs old) shook covered his ears, shook his head, and shook his walker at us. My friend gave a short blip of the gas, which startled the old man, and also let off a few alarms. He walked as fast as he could to the car, and with all the energy he could, cussed us out for a few minutes and flicked us off a few times...to say the least we got a good laugh and got a compliment about the exhaust from someone else a few minutes later.