Your main error, shady, is that you never seem to place things in an appropriate and relevant context. The rest of us seem to be concentrating on the fact that we are discussing a teenager writing a Personal Statement; you've taken it as some personal slant against all MENSA members (goodness knows why), and tell us all that we're "haters" and "fools", and about your vast experience with academia and academics alike. None of us are questioning that, what we are questioning is whether or not it would be beneficial to state (in its isolation) that the OP was a member as to somehow “wow” an admissions tutor.