The Five Dumbest Things on Wall Street This Week

1. Message Board Bandit

Whole Foods (WFMI Quote) chief John Mackey isn't looking too wholesome.

The founder of the Austin, Texas, organic grocery chain was unmasked this week as a rogue poster on the Yahoo! Finance message boards. Writing under the assumed name "Rahodeb" -- an anagram for Deborah, his wife's name -- Mackey spent eight years talking up his company and trashing rivals such as Wild Oats (OATS Quote).

"The company still stinks and remains grossly overvalued based on very weak fundamentals," Rahodeb wrote of Wild Oats in a March 29, 2006, post. "The stock is up now, but if it doesn't get sold in the next year or so it is going to plummet back down. Wait and see." ...