I don't think that the U.S. gov. will wipe out an entire industry.
ask the model rocket guys that question once! as it stands now, model rocketry is a thing of the past, only fedex is shipping engines, and they are going to stop also very soon. under the patriot act, model rocket engines are explosives, and need a certified person in charge of them 100% of the time during shipment. (in addition to the user needing a ATF explosives license to launch an estes B engine...)