Dating site OK Cupid has carved out a nice little sideline in blogging about the statistics of their more successful users, to try to help people along the way, busting myths about what does and does constitute a good profile photo and whether eating oatmeal correlates with people you'll like or drinking beer correlates with sex on the first date.
What is nice about the internet is that you have so many websites to choose from. For example, if you asked your child or teenager not to post personal pictures or videos of themselves online, but they still continue to do so, block the social networking websites that they use.