He rides 6 mile all the time, he's a regular. I personally don't approach people and scold them about trail conditions as I found most people don't like being told what to do. I take a "mind your business" attitude about the topic, after all it's only a trail that is gonna get eroded from weather anyway, it's not the end of the world and I rather avoid the confrontation from the one person that's gonna tell me to go eff myself.
Rangers see ruts and hikers see ruts and hikers complain and then we lose access because the rangers will have to do something about it. Riding is not a right it’s a privilege so please say something to him and tell him to stop.
And selfishly speaking, I hate riding people’s frozen ruts in the mornings. 99% of the time their lines suck and it’s annoying, so I hate it, not just for access, but because it ruins my ride. On top of that, instead of cutting new trails, we end up fixing old shit.
So saying nothing isn’t an acceptable answer to me. Say something - it helps the sport and all of us.