The black screen option does not work - neither on Windows remote PC or Mac remote. But what is even worse is that you don't get a notice in many cases, which could be catastrophic since someone then might be able to evesdrop on your session. In some you do where it says you should install the display driver with no info on how to do that. Sorry - why isn't it installed when you install teamviewer?
I can understand this issue is 1-2 year old and has not been fixed, which seem very strange and disturbing.