His info is known so when he expose someone they can use that info to hurt him, ripoff report is given to you as one example of someone "hurting" him (reputation), that is how I understood that message.

Other than this, you should be aware that Ripoff Report is extortion site, anyone can anonymously submit report against someone - while Ripoff won't verify such reports, they will post them and you will have to pay them to investigate those claims and to remove them from site.