Because the service is getting grayer. Law enforcement and government are going after any of the m**er that they have got a very tangible evidence that require them to tagg to the case. Bitcoin m**er is illegal, but government always wants to oversee everything, our privacy is a crime and by so doing they can tagg it as illegal because they believe that some money laundering activities are going on in the m**ers. If m**ers are banned from the forum, it's not banned outside side here, although depending on your country policy too.