Before I get into anything else, go over and read this.
Maybe you haven't heard because your head is in the sand, you've been living in a monastery, or you're smart enough to not be on FaceBook.
Either and/or any way, go read the article and get up to speed. Then donate to the Sustainable Trails Coalition when you're done. If you've got PayPal, it should take about twenty seconds. Trust me.
The "trail damage" issue?
Horses. Need I say more? I don't want to start a horses VS MTB'er thing, but if you've ever seen the damage that horses do to wet trails... yeah. We all cause damage. Some more, some less. Wanna keep it true "wilderness?" Ban humans... except naked humans carrying zero things. Cave men are a true part of wilderness I guess, so no need to keep them out of the woods.
Trail user conflicts?
For every hiker that has a horror story about an encounter with a mountain biker, I've got one about an indignant hiker yelling at me for riding on legal trails... or an unexpected face-to-face with a sketchy horse on multi-use trails... or stuff that's been purposely dragged into trails to ruin the experience for mountain bikers. There's always going to be a subset of dickheads in any slice of humanity. If five seconds of exposure to this subset ruins your day, you weren't having a terribly good day to begin with... or you're within that certain subset of your particular slice.
I also have even more stories to share about positive interactions with hikers and horses and horse riders and tourists and other mountain bikers, so stuff all your negative banter. The internet has ruined arguing for everyone because the louder the virtual voice. The more one is perceived as relevant by those with supporting views, the more they seem more like a nut job to those who oppose them.
I was going to write about something else, but I don't want to take up any more of your valuable time that you could be using to send money to the Sustainable Trails Coalition or time that you could be making money to send to the Sustainable Trails Coalition.
I'll get back to whatever it was I was thinking tomorrow.