What I learned about internet "trolls".
During one of my life encounters, I was placed around some mentally disabled kids. It was then I discovered that they had taken advantage of a thing called the internet. Over time, I found out that some were very keen on youtube. They're still people, but they have the mentality of someone who is much younger. They listen to what they are told and believe it and preach it loyally. The comments I've seen posted by these guys made me realize then that many of the supposed trolls on the internet could be kids like these. Many people fight against trolls and respond with hateful speech.
My word of advice is simply "don't feed the troll". I certainly wouldn't want to find out I was yelling at someone with a disability. If you see a hateful comment, just let it pass. Hope I've helped shed a new light on the position of the internet trolls.