One pitfall that isn't really mentioned. When you're surrounded by soulless careerists who spend 99.9% of their time and energy pretending to be busy and sucking up to the boss, and they get ahead, and you feel like you're going crazy so you talk about it to other people – and they assume that you're the drama queen.
The most positive outcome you can hope for is that they'll have to work with these douches, too, and experience it for themselves. Forget revenge. Nothing feels as good as that 'Oh my god, you were right about soandso!' email.