Trolls are well common beings that existed since long time in the human history.
Their purpose is to suck the most value thing in human life’s: their time.
They mostly uses psychological strategies to confront humans, and they get’s excited when this provokes endless debates.
If you see any of them, you must kill them with fire to destroy their genes.
Answering them is known as feeding the troll, but you can try things like:
- you must try windows or ubuntu, since elive doesn’t satisfy your needs
- sounds like you can do it much better, please notify me when you have it
- don’t complain, suggest
Their psychological attacks are mostly based in reversing (invert) the sense of something, like:
- if windows is a very insecure system, he will convince you that is the most secure ever
- if you love a person, he will talk you about things that you will end up hating that person
Unfortunately, ignoring that should be the best strategy is not enough, because their damages act like a virus spreaded to others, they have the ability to destroy entirely an organization, relationships, or even linux distros, so the best practice to do with them has always been to simply ban them (and burn in fire).
More details about Trolls and their scientifically-studied behaviour: Internet troll - Wikipedia