This is sad and all too true. As a cyclist and runner on the trails it upsets me to see so many impatient, rude, and inconsiderate people on the trail. From the giant groups runs sponsored by local clubs who fill 3/4 of the trail, to the cyclists who don't seem to know how to use their brakes to give other a break. It appears the self-important these days merely get out their cars and onto the trail and ruin it for the brotherhood of good natured trail users. Naive? Maybe. But I'd sure rather be that way than a jackass.
That is such an annoying article.
Unless he was standing on the trail at the blind corner near the rec center there is no excuse for the cyclist not being in control through there. We fail at getting along on the road who would think the trail would be any different.