I was thinking that when I take my boat across state lines, I am supposed to wash it to prevent introducing new species into Texas waters. When I wear my trail runners through a stream in Arkansas, then come home with them, I might be doing the same thing! We need to put a stop to this right away. I say anyone who does not like trail runners, put your money where your mouth is and buy and install pressure washers and sanitizers at every trailhead in America so that we can clean off. Who cares about trails, I am worried about the lakes of Texas.
Back to the topic; Who made up this story? Trail runners are lighter use less dead cows to make, you are on any give mile for less time using less oxygen, tracking less mud away in your car, I could go on but my lunch break is over.