It's about the practice of stealth camping (illegal camping), and why it's a bad idea, even though it may seem like it hurts no one.
Here's an excerpt:
Bragging about stealth camping to our friends should not result in smirks and knowing nods in commiseration of the difficulty, at this point in time, of backpacking along the entire NCT. It should result in worried looks and admonitions. People who are friends of the North Country Trail for the future will not stealth camp, or encourage it in others.
I won't tell you how many other things I'm behind on!