There's nothing exceptional about it really.
It's just a purpose-built venue for people to vent and blow off some steam without cluttering other threads, not a "go stand in the corner" type of punishment
The reason posts are moved is because it facilitates easier selection of reading material for the user and it's not only this thread it's done for.
A couple of days ago another thread was going off-topic by discussing the differences of coop and DF modes, a user helpfully suggested we take the discussion to another more relevant thread, so i just moved the off-topic posts into another thread for which they were considered on-topic, told everybody where to find them and the discussion went on like before without any ruffled feathers.
I don't see why this thread should be any different, especially since the alternative up till now was locking threads and banning people if they wanted to argue among themselves. Now there's a dedicated thread for that with a bit higher tolerance level and an off-topic nature by default, which means it wouldn't have to be locked. The reason it's a single thread is because this is a flight sim forum and not an arguments forum.
Generally speaking, i prefer to have a thread partitioned into separate topics if it starts sprouting separate discussions, i don't like just locking everything that goes off topic and i don't want to hand out bans. This is why i went with this approach, if people want to argue about speculative topics they now have a place to do so and if other people don't want to they can just not read/post in this thread, so everyone should have the ability to have the kind of discussions they like.
What is not possible with this approach is for group A to force their kind of preferred discussions on group B and vice versa, which i honestly think is a good thing: everyone should be able to have their say without having their conversations sabotaged and without being offensive to others.