How would you verify that an employee was fired for peaceful protest or that self-reporter even worked for the company? Would you demand that a company admit t

How would you verify that an employee was fired for peaceful protest or that self-reporter even worked for the company? Would you demand that a company admit this was the reason or would you trust the person that created the entry for the employer? How would an employer get itself off this list? How would you avoid libel? How would you verify the identity of the person making the entry and that person is even in the "RAP BACK" database? How would you prevent verified self-reporters from being discriminated against for future employment?