More than 98% of money laundering is done with FIAT, but that doesn't matter to some, cryptocurrencies do, because they are not under their control. Mixers are not illegal, we just have to act thinking about the future.
You are actually right, @Freemind. I still remember an article I was reading about banks that were found to be mostly used in money laundering, and then I saw the name of the bank, like Bank of Credit and Commerce International (BCCI), Nauru, Danske Bank, Standard Chartered Bank, and Wachovia Bank. The fact is that billions of dollars of laundered money have actually passed through those banks, and I believe that the record that those authorities took was only for the one that they caught; there were still many other laundering cases that were not noticed.
Money laundering is not only done through crypto or Bitcoin mixers. I think the problem that the government has with Bitcoin mixers is the privacy they give to Bitcoin users. Although we cannot completely dispute the fact that some money launderers might use mixers to commit illegal acts, but it doesn't condemn Bitcoin mixers illegal. Or should we say that "Banks" are illegal because some have been used for money laundering?
@OP, The Bitcointalk global admin has only taken precautions to protect himself and the forum from government claims in the future that could lead to shutting down the forum. The global administrator of bitcointalk is a US citizen and known by his identity.
I have already read the admin's topic regarding promoting any service on this forum, and it is not an offense even if all the mixers come here to promote their service.