Question dealing with new members here who seem to be banned after only one post

[Habluka]

I was just going through the forums today and I noticed that there were several people that joined the forums this month that made one post before they were banned. Most of these posts seem like general posts that would occupy the threads that they were posted in, which is making me wonder why they were banned in the first place. Can someone please explain to me why this seems to be happening or begin to make posts about banning people and saying what they did wrong like the actual ac blacklist because this is just getting confusing for me.