none whatever if you mean informing third parties.
the correct procedure is to discuss the matter privately with the individual and then only if you are the person charged with care of that person or someone directly impacted by the person’s behavior. The only time you would tell a third party is if there is reasonable cause to suspect this weakness may lead to harm to the person himself or to someone else, and then you inform only those who have a right and need to know, and who can do something about it.
for instance if the weakness is alcholism, I have a duty to confront that person, and there is a right and wrong way to do it, if I am the parent or other family member, employer or anyone else who is in a position to suffer from that weakness. I have a duty to inform a third party, say if that person tries to get employment as a truck driver. But never is there any good reason to make a general broadcast of that knowledge.