Ask Bill how easy things would be in Alaska, for example, if piston aircraft were grounded. Or the recipients of Angel Flights. Or Pilots N Paws rescue pilots. Or look at what us bad, privileged piston aircraft pilots did after Katrina hit. A lot of people will suffer if you ground piston aircraft because of the fuel. You'd be cutting off your nose to spite your face. On balance, GA contributes vastly more than it harms. And we're getting rid of it anyway (see link below).