Yup, I know what you mean. I had to chew a neighbor out one time when we were riding on a nearby abandoned railroad bed that is used by some local atvers, hikers and horse folk. We came upon 3 people riding horses. We stopped quite a distance from them when we saw them and I said we should just sit and let them pass, he said screw it and continued on, not at high speed, but still startled the horses, while the rest of us sat until they passed and thanked us for waiting as they passed. I told him to quit acting like a feminine hygiene product and show some respect, because if they complain, and enough others complain, they'll lock the trail down for ATVs. I still don't think he gets it. I guess it's true: You can't fix stupid
ETA: The few tree hugging-environazis I've met seem to think that they can do whatever they wish to get their point across, including putting humans in harms way "If that's what it takes" (One guys comment)