How to Deal with Trolls
Don't Feed The Trolls
The most common advice for dealing with trolls is to ignore them and they’ll go away. This is true in most cases. Because trolls live for a reaction, silence causes them to die out or move on. Some of the more adventurous trolls need to be dealt with differently.
Grow Thick Skin
Trolls will never go extinct unless mankind ceases to exist as well. If you are new to being trolled, I know it's tough, but their reality is not yours, nor should you ever succumb to it. If you do, you might find yourself becoming a troll yourself. That's the way it works. If you are a good person, trying to be good, do good, and remain civil, you aren't a shitty person.
You cannot change anyone's opinion through online discussions, especially if the discussion begins through inflammatory loaded interjections. Don't try. There's great advice from Steve Pavlina, a personal development blogger, who says one of the best way to respond is "You could be right," and to leave it there. Who can argue with you when you give the person what they want which is to be acknowledged and heard? Typically, trolls don't fight with logic. You could supply scientific facts and data to inform of them of their ill perceived point of view, but they would respond with nonsense. It's a futile battle.