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The key word is "section." The "tribune" topic is a topic, not a section.
Therefore, I don't know where you saw 400.
If a person scores 100 points and is banned for the first time, they are blocked for a week. For the second ban, it is not necessary to score 100 again; 5 is enough. The fourth ban is the last.
Do you know why the last points were added 5 years ago? Please think about this, instead of urging everyone to follow the regulations and rules.
Changing general forum rules is a long, tedious process and can lead to disagreements with other sections, so they were quietly ignored in G3-online.
Any moderator and coordinator has this rule.