Patreon alternative site Locals recently bragged about having a troll-free website on Twitter, a site comprised of nothing but trolls. Some of the comments were astonishment and asked how they could have achieved such a feat that has eluded online communities for centuries. Locals declined to answer, but after doing extensive research (i.e. using Google for five minutes), I was able to decipher their secret sauce. They use an ancient technique known as: You have to pay to use the site in any meaningful way.
So, congratulations to Locals for raising the price of trolling from free to whatever the cheapest 'community' on their platform is.