Actually, it's the best way to go. I've worked in the space propulsion area for a decade, and have been approached many times by what can only be described as lunatics who have invented perpetual motion machines, warp drives, inertialess drives, etc. (my favorite was the nut who believed the old Convair B-36 - the one with six piston engines - was secretly capable of orbital flight). Any effort to explain basic physics to them is often met with spluttering rage.
You get to know the type, and you get to know what to do about them. It carries across the various scientific fields. So as with the UFO nuts and perpetual motion quacks, the best way to deal with the incredibly anti-science Creationism/ID crowd is to point and laugh, and not take their ravings personally.
