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VC's aren't the sole force that can distort a company out of its original shape. Boom-engendered greed can be such, as can be timid reversion-to-the-mean (in all senses) corporate behaviour once a company has gone public.
I see any of these as a crisis in sincerity: from the point of view of the law, the purpose of a for-profit company is to make money1. If you don't, or if you merely don't do the things other people do in the apparent pursuit of making money (no matter how little sense they make) you can be sued.
If, however, your company should also have other purposes of some sort enshrined in its articles, say "writing cool software and treating employees as if they were human beings" and an officer of the corporation acts in such a way as to obviously undermine them, I really doubt that he [usually] could be successfully sued or otherwise legally sanctioned. I'm sure there will eventually be a test-case where the executive in qu...