I don't know if other people do this, but sometimes they can be a bit of a way-marker.

"Oh, coming from this way, it will be the third house after the trail" -getting directions to a friend's house

"When I pass this trail, I know I'm halfway there"- during a long car trip

They should just put an icon or a pin instead of laying out the trail. It would stop a lot of the questions about liability, and more people would hopefully look elsewhere for the trail details and hazards. It's crazy how often gps-related deaths happen.