Let me get this straight, we've all been witnesses to Locke's fanaticism and to his believing he's on the island because of destiny, to his revering the island as this giant deus ex machina guiding its inhabitants and having a plan laid out for them, to his acting crazy according to his beliefs, based on the fact that he miraculously regained feeling in his legs, but when Charlie does the exact same thing, acting upon his beliefs deriving from the same hallucinations Locke is guided by, he's considered a lunatic because of the drug problem he had in the past. I understand the right one has to doubt a possibly still using drug addict, but everyone has been driven by madness in a way or another (Hurley believing he's invincible), so how about we cut that poor Charlie some slack.