Usually it's a warning or 2 and then a ban (of varying severeity based on the nature of the infraction).
For example, you call someone something kinda offensive - might get ya a notice or a short ban (had it happen). You go on a racist tyrade all Michael Richards style... probably an instant and permanent ban lol.
English
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What I am asking about is posts that are removed without a ban being issued, e.g., I have receive4d a notification that someone replied to a comment I made within someone else's post, and when I click on the notification to see what was said, the post is gone with only a message that the post had been met with Ninja Justice and removed. Perhaps if the reasons that they take down a post without issuing a ban were known, the "lines" would be clearer to people...