Just wanted to +1 what Glassman said; trails that get deleted tend to get redrawn soon after. For making sure that the general public doesn't accidentally wander onto difficult routes, it's generally better to add tags to describe the route rather than delete it. sac_scale is a good one (many hiking-specific maps won't display trails above a threshold SAC scale). Another useful tag is trail_visibility (if the route is hard to find). And if the trail isn't officially maintained or operated by the park or forest service, then you can add informal=yes to indicate that it's a social trail.

Hi Greg! Thanks for the info. I didn't realize that unclassified roads were understood to be motor_vehicle=yes by default; I don't think there's any reason to keep this tag on this particular road if that's the case. I don't recall exactly why I added this tag but it was when I was doing some editing along Middle Fork Road to standardize names and alt_names on different segments and add some missing surface tags; I may have added the redundant motor_vehicle=yes on the unclassified road because I saw that it was already present on the track road further along (or perhaps I added the tag to the track road too; I can't recall). In any case, feel free to remove the tag, and I'll keep this info in mind for the future. :-)