Create a new classification of signs that pro hikers can move depending on the prevailing conditions as a sort of heads up to anyone less experienced coming after them. They could include, dangerous animal spotted, loose soil ahead, advised path or even an advisory to reverse direction.
Trail markers are pointless unless you have been hiking for a while and know what they mean.
Fixed animal warnings are also pointless since animals sometimes change their trails to avoid other animals or to look for resources. An update would be helpful.
Overnight rains may loosen soil and rocks, especially on frequently used paths making them a safety concern even with proper equipment.
When you're getting into hiking or anything like that, your first epexience greatly affects whether you'll keep at it or give up. Being in the know generally creates a sense of safety and makes you want to experience more.
If they make new trails every day, it might add to the sense of adventure each time you go there.
Major parks can afford scouts for this but public or even small private parks can't. This system could be implimented by working with their own hikers to preserve the safety of new hikers.
Every morning, at the guideposts they give their veteran hikers lightweight signs than can be planted on the ground. Since they enjoy carving out new paths it wouldn't necessarily be a bother to them. Everyone who comes after can then just follow the signs. These signs should be really self explanatory, no codes or hidden meanings. They should allow for a blank space where other people can write things on them maybe notes or just personalized messages.
I was on an endurance biking trail recently that started really early in the morning in order to finish the trail within the day . I found it strange that although the first bikes crossed paths with a hippo on the designated biking path, there was no way to tell everyone behind them to change direction without having to go back and warn them in person. It would have been great if they could just leave a sign informing everyone of the new path they took and another warning of a dangerous animal on the path we were on.