There's degrees of crazy out there, and it's important to distinguish between them. Your mother might tell you about someone at work who is just "crazy." Her name is something like Phyllis, and she's "crazy" because she did something like ordering the nachos with extra jalapenos one day at Los Loros. She could barely eat them! Wow, that was crazy, and it really wasn't, and that's why you need to be careful about how other people use the word crazy.
Then there's active and aware crazy, a condition most accurately depicted in Auburn tree poisoner Harvey Updyke's scathingly honest self-assessment in his ESPN interview with Wright Thompson.
"Well, I'm just a very unhealthy Alabama fan," he says. "I live it. I breathe it. I think about Alabama football, I'm not exaggerating, 18 hours a day. I have always been that way."
That's another variety of crazy altogether, and a much more accurate use of the word. The final variety is the purest, the kind of crazy where the person doesn't even know how crazy they really are. That's Al from Dadeville, by the way, who is also Harvey Updyke, and you'll just have to read the whole thing to figure out who is whom in the grand scheme of things.