Not all Hackers are bad. The good ones are called “white-hat hackers” and use hacking to improve computer security. The ones who are just having fun are called “gray-hat hackers.” But the malicious kind you’re thinking of? They’re called “black-hat hackers.” And they can cause a lot of harm, as history has shown. Here are some of the most infamous and nefarious “black hatters,” what they did to earn their reputations, and where they are today. 1. Kevin Mitnick The U.S. Department of Justice called him the “most wanted computer criminal in U.S. history” — that’s how notorious he was....