By your reasoning I am perfectly allowed to create the topic where I will say things like, "bitcointalk forum is run by wretches and the whole forum is nothing but scammers gathering" and that would be OK, right?
You could call those "wretches" running the forum (being theymos) themselves scammers, if you want to.
Scandal Source says Theymos scammed 6000 BTC, worth $14.8 million dollars today(Obviously that topic is pure bullshit, yet it still exists, as it's not breaking any forum rules.
No, I'm not facilitating the creation of spam/troll topics, just giving examples of how moderation is executed.)