As said above, I am sure adcoms browse SDN for various reasons including, finding out what people are saying about them, what people might know, or how silly some of our topics and discussions might be.
But regardless, medical school admission is a competetive field. It would be foolish to say something that you would not want attributed to you either by an adcom member or someone else reading your post. you have worked way to hard for that. Remember, the main purpose of SDN is to help all those in the pre health professions make it to and through our schools. It helps us easily gain advice which would be hard to come by, especially with some of our undergraduate advisors that we have.