The title is wrong.
There are always trolls in any community, but only FS locks threads where there are 1-2 people clearly trolling and derailing the topic instead of banning those who made the offense.
As someone who has been online, practically, since the beginning of internet, I have never seen this type of forum moderation where one or two trolls are given the power to lock threads.
So, this one is 100% on FS, not the community.