I don't think anyone sees trail runners as the enemy. The people who know better don't use the trail when it's prone to damage. Increasing the percentage of these trail users would help, but in the end, there's bound to be one or two that cause problems.
Also, I'm not sure why I even brought up the trail pass thing. Aside from what Spike mentioned, if I saw someone out riding or running and making a mess, the fact that he/she had a trail pass wouldn't matter, in fact I might be more perturbed if someone claimed the trail pass gave him the right to muck up the trail.