I partially agree with you. But I am sorry I cannot agree with all that you said. Suppose, You deposited on a casino and they scammed you. You didn't break any rules. if you post on their thread they delete your post and have no communication. Would you say the same that I didn't accept rules that's why I got kicked out? And That's happening. If you dig out a little bit, You will find examples as @Ratimov also wrote on the OP.
Self-Moderated thread allowed scammers to expand their business even they have negative trust and Warning on their thread. Most of the newbies don't look at it. What they did is visit the thread and read the thread and they read maximum first or and the last page. The thread creator deletes all the comments from his thread that are against his scam business. So how people will know that they operating a scam business if they didn't notice their trust rating or warning? You might say, If they don't notice warnings, you will not care about others' opinions. Not true. Sometimes it's reduced that chance.