Absolutely. Which is why I am glad he pointed these risks out to me - no one else who is unbiased does or is even aware of the worst-case outcomes. If there is a way to resolve a situation without calling the police, why would you take the risk?
Another thing my friend likes to do is post news reports of police abuse to social media. One of these is very relevant to the original post. In 2013 a father called the police on his son, after the latter drove off in the father's automobile without permission, to "teach him a lesson." The police response was to murder his son: http://www.cbsnews.com/news/tyler-comstock-killing-iowa-poli...
Threatening your kids, family, neighbors etc with the police is not only distasteful but can end up in tragedy.