While I doubt Maddox alone was a serious influence on anyone's stock price, commentators like him definitely have an influence on people's attitudes; when Crocs became ugly and smelly in the minds of many potential customers, those people were no longer potential customers.

(Whether Crocs are actually ugly and smelly is beside the point, though I agree with maddox here)

I was going to post this because it is the specific reason I never bought Crocs. Also, I liked telling people how ugly their Crocs were, and his page helped.

I think the Vibram Five Fingers helped the downfall too. I bought a pair of the KSOs and there's been two days I haven't worn them since I got them. People that buy crocs want to have neat shoes that are a little eccentric. They stop being eccentric when everyone has them. Vibrams are now more eccentric than crocs, so the fad is fading. This isn't to say that crocs won't continue to have regular customers though.