Sure, a stock silencer has a built in DOT approved spark arrester, an aftermarket silencer with a straight through design ,has the opportunity to catch random sparks as they pass by the holes packed with fiber glass. In most states, operating without a silencer on any public land or forrest will bring a hefty fine. If caught in Maine, the game warden issuing the citation will not allow the machine to move except by tow. As far as the melted plastic, the pipe/silencer combination is designed with the mounting bolt on the silencer as part of the rigitity of the set. You will soon find the broken center bolt on the pipe, and before you get home you will find melted plastic. Other than that, enjoy the blat.