Hiding comments on social networking sites like Facebook and MySpace can be helpful. If you have comments on your page that you do not want to be posted there are settings you can adjust in the preferences tab of your page. This way each time you receive a comment on your page you have to approve or reject the comment. The downside to this is that there may be a delay to from when the person actually posts the comment until others can read it on your page. Of course this does give you more control over the content on your page.