Don't worry about them, they don't know you and nothing else better to do in theirs lives. Most likely none of them could ride 15 miles if they wanted to. I use to have a guy that I worked with that always told me when it looked like I was putting weight back on. He never once mentioned when I was losing weight. It hurt more because he knew how hard I worked to lose the fat. He was just being a jerk, and so was the guys that you ran across. You have better things worry about. Ride on !!!