You can only get positive feedback and go on with doing your stuff and doing it right.
The thing is... why did you get a Ripoff report? Because in order to minimize is damage, you need to know the real cause. It is a completely different subject if you had it because you didn't behave too properly in your business than if someone wrote a false complain or were paid to damage your site.
I find the first situation easier to deal with than the second.