Their moderators are children and actual adults need to do the job they are demonstrably unfit to do.
To give a bit more detail, the first bit was such tame, garden variety trolling that even they should have gone "gr8 b8 m8" and moved on, they didn't need a mod warning for something that milquetoast.
The second was a point of debate that was reasonably civil between two posters over a strongly held point. Had it devolved into shitflinging it would have needed intervention, but not before.
The last one is the mods themselves attacking a poster for someone pointing out the flaw in someone else's logic when their reaction was the crux of the illogic.
I've seen discussion on the worst parts of the chans with less idiocy by the mods.