I would quietly & politely leave, possibly after a candid, thoughtful conversation with the founder in question. Or, I would be quiet and put up with it.
Five years ago, at 20 years old, I was offered an amazing opportunity -- running leadership conferences across Canada, and leading teams of youth around the world to promote business/development. I'd been running projects with the organization for a couple of years and absolutely loved it.
Then, I discovered that the founder was committing fraud with taxpayer money -- criminal mismanagement. Had anyone gone to the media, it would have been a juicy scandal involving taxpayer money (but that would only have hurt the youth involved). He was hurting himself, his family, and at times even putting people in danger.
After consulting mentors I trusted (an ethics law professor, retired business person and retired diplomat)and a five hour conversation with the President, I turned down his bribes and caused a minor but localized fuss in a genuine attempt to improve the situation. It was unsuccessful.
Even though I was right, and even though my mentors and friends verified this and helped me form my actions, I would have been much better off by keeping my mouth shut, politely declining their job offer, and simply shifting my focus to creating my own future.
This would have avoided the stress of going through hell in a fruitless attempt to make things better, that most people would never understand and would leave me disconnected to a group of people I loved being apart of (aside for just the couple of people who were causing all this nonsense) -- I was disconnected from them because I couldn't explain why I was taking action without endangering the good that the org. was also doing for a lot of young people. ie. I didn't want to harm the org. by actually having the media get wind of it.
So next time I will button my lip, acknowledge the world exactly as it is, and stay focused on what I want my own life to be instead of getting hung up on others..