Until reliable field tests are developed for TT (Testosterone Toxicity) and/or CSD (Common Sense Deficiency), education will continue to be the best method.

At certain trailheads in New Hampshire's White Mountains you will see signs similar to this link. They also appear at treeline on some trails. I don't know how effective they are in practice, but at least for me they remind me to do a mental, and sometimes physical, inventory of clothing and safety gear in my pack. Perhaps the Inyo US Forest Service and/or Park Service should consider their use on the Mt Whitney Trail.