Erick, how about this scenario? You've been riding your dirtbike, oh, 2 weeks. You live next door to a MX track. You going to ignore the MX track to find somewhere no one else rides? Didn't think so. You'll get used to the track & people, but there will still be the odd bike that gives ya the ****s. CR500's are the worst - you don't hear them coming in single track until they're next to you & give it a rev (yip, had it happen to me). He didn't mean to spook me, but he did. I can't be bothered holding a line if no one is behind me, I'll choose the best route & it may mean crossing over the trail at points, but if I know someone's there, I'll just go with whatever I've got ahead of me (does that make sense to anyone but me?)
Horses don't usually mind motorbikes, some may be a bit skittery but if they're going to be near bikes, they're usually not too bad. It's the odd one we have to watch out for (we, the motorcyclist). They can hear us coming, so the rider can turn them to face us or get the hell out of there fast. Mountain bikes give them the ****s as they don't hear them coming (both the rider & horse) & all of a sudden they're there (this is according to a horse rider I've met who runs a rental place).
The horse riders I meet will usually either ask me to wait till they're out of sight, figure out which way I'm going (so we don't head in the same direction), or tell me to keep going (depends on the horse). With me having killed the bike, they know that I'm not going to give it the berries as I go past them & it gets the horse used to bikes - I've even been allowed to pet some as I sit on the bike, helmet on (and to me, that is a cool feeling - I love horses/animals & sitting below them is freaky).
They've been good for some of the trails we've cut, they don't cut their own here - why should they, they use ours (would be nice if they did for a change). We respect them, they respect us, we co-exist - none of us want to be shut out the forests we ride.
No, not all conflicts are intentional, but the initial post tells us of one - this is the sort of thing we don't want to see. Unintentional happens.
As for agreeing all the time, that sounds like a boring thread ;)