Trolls
Trolls (Cyberbully's) are present on almost any internet platform one can consider ranging from simple threads to forums. They can take many forms from the 'expert' in the field that offers an opinion that dare not be challenged, to individuals making outright threats against others. They are often very disruptive to any meaningful discussion and may cause high levels of doubt and anxiety in their victims.
A troll (or trolls) tend to aggregate where other people gather, much like the mythical trolls hiding under bridges waiting for people to cross. They often jump into a thread attacking any weakness that they may think may be present. Often self absorbed with their own feelings of worth they thrive on arguments, may spread lies, offer their own twisted opinions, and want nothing more than a emotional response from an audience. They may seek to disrupt your following and even your business in some cases. When they perceive they perceive a defense or even an attack on themselves they often resort to name calling, slurs, and social/political labels to try to gain power. Very similar to the mythical trolls, they are often Cyber-cowards and would rarely if ever confront their victim(s) in real life with an actual honest conversation.
Trolls can be difficult to defeat, since they often have an altered sense of reality. They don't play by the same set of rules as rational people. There are things that can help:
Remember that in many cases, you will not know the troll. Although they can be hurtful, their words are essentially meaningless in the real world especially if you have an audience that appreciates your work. However in some cases trolls can escalate to stalkers and follow you on your personal pages, forums, and other places you may visit. Many cities have laws against cyber-stalking especially if threats are issued. Resort to law enforcement if and when you feel the need to have help.