If you notice some negative comments about your product / company through Google Sidewiki, Ogilvy shares some ways to help you fix that:
1. Create a webmaster post on your homepage’s sidewiki. This post will always be at the top of the sidewiki allowing you to greet sidewiki users and provide tips on your site’s offerings, special features and navigation. It’s the door to your website and a chance to decorate a little.
2. Do not create fake Google accounts and seed positive comments on your sidewiki or negative comments on your competitor’s. This should go without saying, but it’s too important not to. The internet is filled with sad stories of people who did not heed this advice. It’s not worth it. link.