Elon Musk and Mark Zuckerberg regularly resort to pettiness — but they are not the only wealthy tech moguls to do so.Justin Sullivan/Getty Images and Kevin Dietsch/Getty Images Pettiness is the order of the day for prominent tech bros. Elon Musk, Mark Zuckerberg, and others are behaving similarly amid their rivalries with each other. It comes at an awkward moment: petty season has come straight after layoff season. Is there something in the water in Silicon Valley?