"...what really influences trolling behaviour is the social pleasure derived from knowing that others are annoyed by it. The more negative social impact the troll has, the more their behaviour is reinforced. Happily, this discovery suggests an easy way to deal with trolls: ignore them, rather than giving them the satisfaction of an angry reaction." https://theconversation.com/dont-feed-the-trolls-really-is-good-advice-heres-the-evidence-63657