I'm not sure if you've both been following this story, but this isn't a random lawsuit. The big companies all got together to stop them 'poaching' their other employees. This essentially means that if you were working for Apple, Google, or Adobe (to name a few) you couldn't get hired by the other company. There's even an email shown where Steve Jobs was going mad at Google over them trying to hire an Apple employee.
This severely screws over the hard-working employee. It means that they don't have an opportunity to work in another large tech company. It also means they don't have much to go on when negotiating for wage, because they're not going to be offered a job by their direct competitors.
It's evil, immoral, and shameful.
That's absolutely right. Employees have every right to be pissed and to sue for damages. Shareholders have no right suing Apple over this. This guy wants to make money off a rich company. Nothing more. Also what gives him the right to sue "on the behalf of all shareholders". He can't prove this affected him or other shareholders negatively and should be told to go home.