Anyone on the internet blogging or using social media deals with trolls. Facebook? It's filled with creatures from Grimm's Fairy Tales!
Usually trolls are anonymous and cast their aspersion from underneath a rock or hiding behind a silly fake name. Often their comments are personal attacks along with name-calling and sometimes profanity. I have a few trolls and my way of dealing with them nowadays is to delete their comments as soon as I recognize the source. That usually takes reading about ten words then into the circular file they go.