Facebook’s big debut on Wall Street turned out to be a milestone the company probably wants to forget as soon as it can, though that won’t be possible for a pretty long time. By most accounts, Facebook’s IPO was a disaster. Not a total disaster, of course — several new millionaires and billionaires were minted last week. CEO Mark Zuckerberg became one of the 30 wealthiest people on Earth before living that many years. But market glitches, bad decisions and allegations of shady dealings marred the social network’s first day out, and problems continued through the following week.