I have a friend who for the purposes of this question we'll refer to as Paul. Paul is a University professor who hasn't been actively involved in business outside of academia. He's shown me some very interesting algorithms he's developed with serious business applications. There are a few in particular that I think could make him significant money.
My former employer, who we'll call Bob, is not someone I'd work with again. I'm hesitant to disclose the details of why I don't trust Bob for fear of indirectly identifying him (or myself), but suffice it to say I believe my reasons are sound and not specific to my experiences with him. I would have serious concerns for anyone working with him.
Recently Bob began contracting with Paul and attempting to make some money off these ideas and algorithms. I'm not privy to the exact details of their situation, but I have a bad feeling that Bob may not have made everything fair. There may be nothing to worry about, but if my fears are correct Paul may be headed for a very bad situation.
On one hand, my friend is an adult and perfectly capable of making his own decisions. On the other hand, I would've greatly appreciated someone warning me what Bob was really like before I started working with him.
Should I warn my friend about Bob or leave it alone and mind my own business?