What you said is true but having said that it is somewhat sad because there is a contradiction in how the forum operates. On the one hand scams are not moderated yet at the same time many members are constantly posting about scams and scammers to warn others.
It would take something monumental to happen with users signature spamming or alike for 1xbit1.com signatures to be banned from this forum but their account would most probably be not.
I'm just wondering about this gambling platform, the number of shreds of evidence that it's just a scam, and many people are fooled why it still exists in this industry, even here on the bitcointalk forum. And there are still other community members here who continue to campaign despite everything that they have also been given red trusts on their accounts. It should disappear from this forum forever, is there a way? as if this gambling site will not be the next victim?
If you did proper research, you would have learnt the answers to all of your queries pretty easily. Simple answer is that this is a free speech forum which is why 1xbit hasn't been blocked in this forum(Yet).