The folks at Tricitybroadband.com have a page that refutes failures: Many of the anti-municipal networking foes have released misinformation about what they describe as financially flawed or failed networks around the U.S. Unfortunately, although there are certainly municipal services that haven't worked out--there have to be some failures--the ones that are bandied about are typically misrepresented. Tricitybroadband.com has a regularly updated page that provides the official response and financial details refuting this misinformation.
The point here would be to work with facts: if the facts that the utilities, cities, or Tricitybroadband is presenting are incorrect, then other facts could refute them. We could have, say, a real debate going in which real information was presented, examined, and conclusions reached.