That's extremely challenging, especially because the Internet affords individuals with anonymity. When someone can remain anonymous, there's no accountability for their actions.
There is also something known as RateMDs, which has become a very toxic environment. It's actually owned by the Toronto Star corporation. They even write negative reports and then solicit physicians to have those negative reports.... According to one National Post article, those reports are possibly even being written by the very company itself. Things like this are extremely toxic. Not only are physicians then dealing with toxicity on the front lines—a toxic college, a toxic government—but it's now a toxic Internet as well.
I think that's where government can come in and play a positive role. When businesses are profiting off of the misfortunes of others by creating false reviews and then trying to target physicians to subscribe, at an enormous amount monthly to have those reviews removed, we have a serious issue.
One successful libel suit came forward here in Ontario just this past week against RateMDs. Hopefully there will be more, so that the toxicity ends.