Theymos probably opened a Pandora's box when he banned mixers from bitcointalk forum, because US/EU officials can now call anything to be a ''mixer'' including bitcoin wallets 
Yet A cryptocurrency mixing service is not necessarily illegal. It is an online service that allows users to disguise the origin and destination of cryptocurrencies. Even if the wallets are classified as mixers, they are legal.
Is Samourai wallet now banned from Bitcointalk? No, I can type https://chipmixer.com/ and http://sinbad.io/ without getting banned.