That does seem a little risky, I've ran over something and broken a pipe mount before.. I guess all it would do is kill the engine if it gets hung up though....

I've also heard/read that plugging the pipe isn't good for it, therefor I don't do it that way... I have to take the body off to shut mine off too but it only takes a second if you have your body clips set up right... but, to each his own..