Maybe some people, but those are the kind of people who would probably try to find something to use against you whether they knew your weaknesses or not. [She would know, being a jerk and all.]

Besides, this point of this was for other people to tell you weaknesses they think you have that you might not be aware of. Obviously, if you have a weakness no one else but you knows, it's not gonna get out. And if it already was out, then... well, this post wouldn't make things any worse?