Dumping the exhaust behind the rear axle?

When I got my current car '71 swinger it had turn downs behind the wheel and if I had my two little ones in the back and my wife and I in the front for a little cruise they would rub and bang when hitting bumps etc, just a thought to keep in mind. I took it to the exhaust shop cause like you I didnt want pipes sticking out the rear and I was afraid of fumes getting in the car at idle especially with the youngins in there so i had them dump about middle ways between the axle and the bumper with turn downs. They're tucked up in pretty nice.