I Don't Buy That the Boards are Closing Due to Trolls...
It sounds like complete crap that the boards are closing due to trolls or as the announcement says "not a positive experience."
I think it's because Amazon--IMBD's parent company--doesn't like that there's a relatively anonymous way for people to say things, and I've noticed the comments sections on a lot of websites are now being tied to social media profiles.
It kind-of feels like that book "The Circle," where a tech company's first step towards creating a monopoly was getting rid of internet anonymity.