Are drug and alcohol counselors allowed to talk about clients on facebook?

[Irish Martyr.]

Counsellors,when they give talks to new clients and open events,often comment on some of their clients,highlighting both the good and the bad points of their case.But providing that they don't divulge personal information (or any info. that would allow their identity to be known) then they are well within their guidelines.
However it would not be nice for that person from Virginia to see his Counsellor speaking about him in that manner and he probably would be able to file some form of complaint,because it is unlikely that he would have given her permission to speak about him in that way.I do not agree with Counsellors using Twitter or Facebook to comment on some of their clients history because I believe this to be unprofessional.But that is the modern age and sometimes you just have to accept it.