troll heaven 

Any website that's swarming with trolls, and with nothing being done about it. Such places are only comparable to Hell itself. Examples include Yahoo Answers, YouTube, and practically any forum or message board you can imagine.

Fred: I just commented on YouTube, and now there's a swarm of trolls on my ass.
Carl: Now you know why it's troll heaven.

troll heaven by TheWriter April 20, 2013

Trollhaven

Any websites on the Internet where trolls converge one way or the other, such as 4chan.

Joe: "I ran into this website early today."
Jane: "Oh?"
Joe: "And it's a trollhaven. Wherever I went there were trolls everywhere."

Trollhaven by Cid SilverWing October 17, 2008