If your question is, can the founder maliciously single you out and dilute all your shares to zero because he hates you? That would be illegal, and you could p

If your question is, can the founder maliciously single you out and dilute all your shares to zero because he hates you? That would be illegal, and you could probably sue in that case. If your question is, is it safe to do a business venture with people you don't trust, my answer is no don't do that. There are many ways founders/investors could make you unhappy if they wanted to.