People do not bite the hand that feeds. How many stories have you read where the VCs get lambasted by founders and employees? Not many right?

Remember it's a two way street. Sure maybe there is some incentive for VCs not to be ass holes. But there is equal incentive for founders (many of whom are serial entrepreneurs) to stay liked by the VC community at large.

Final point: people with "fuck you money" as mentioned elsewhere in this thread, commonly don't give a fuck.