Jade, you just raised a serious point.  The sort of oblivious louts who would trash the Pacific Crest Trail couldn't be bothered reading a newspaper editorial.
How do we reach them, beyond helping them locate a trailhead? 
Ironic, isn't it, bright energetic people go out and  thoughtfully  enjoy a wonderful yet little known place, share their enthusiasm one way or another, the word gets out even to the "less-aware" and the idyllic special spot is idyllic no more.