I suggest that you don't testify for the reasons you've mentioned. Even a good company with good people will have a harder time hiring you. When you hire someon

I suggest that you don't testify for the reasons you've mentioned. Even a good company with good people will have a harder time hiring you. When you hire someone and you have to choose between different people, then a normal HR manager will choose the one that is less noisy. They are not looking for someone who does the right thing, but someone who will provide more value to the company than trouble. The only thing you haven't mentioned that might be relevant is if your silence might hurt someone. Then you have to weight own disadvantage against their disadvantage. Although I'd probably do the moral choice, I don't think it's the smarter one. In real life moral decisions often don't pay off, not even for the people you try to protect. Also if you have spouse or other people who depend on you (e.g., brothers/sisters) discuss with these people and make a decision together. Your decision will also influence their life.