This just leads to survivorship bias. Its a shitty hack. A good review systems needs to encourage honesty, not discretion (selective revelation). The substitution of selective revelation for "honesty" is not a more honest or more reliable system. This is a common mistake, and one that marketers like to promote. As it works to their advantage: to manipulate the selection and revelation process, it helps to have a system in place such as the one you describe.