Honestly, Chico appears to have some sort of cognitive disability, possibly stemming from physical injury. I applaud the man for carving a niche for himself while creating value in society. 

Chico is a nice guy who adds value to the community at Diamond Head overall. He does misrepresent the truth -- he says the certificates are a "gift" in exchange for a "donation," but that's not true. He's selling and visitors are buying.

I personally have never seen him picking up garbage, either on the way up the crater or the way down. And if he is rude or mean, it's because 1) someone is hassling him, or 2) he's got a history of unaddressed trauma in his life that makes higher-level functioning difficult. He's never been rude to me, and I've been to the crater hundreds and hundreds of times.

Instead of this oppositional approach, why doesn't the park work with Chico? Why not collaborate instead of litigate?