Don't Feed the Troll

A 'troll' in this case/post doesn't refer to one of those fearsome Nordic creatures; here, we're talking about "someone who posts inflammatory, extraneous, or off-topic messages in an online community, such as an online discussion forum, chat room, or blog, with the primary intent of provoking other users into a desired emotional response or of otherwise disrupting normal on-topic discussion". You know, those so-called 'faceless keyboard warriors' with tendencies to spend hours upon hours in front of their computers bombarding cyberspace with their balderdash. Hence, the title means 'don't encourage/instigate them'.