you re right, but sweetfx don't interfere with game itself, but with data between graphic card and screen monitor.
However, i've ask support via a case if i can test it, and they answer me that i can make some test with it (after show them the software and explain what it does) to see if it works and make some sort or report to them.
They told me that account may not be locked, and if my account was lock during tests, they just ask me to open a case and provide a ref number they gave me to unlock it asap.
test ended now -> sweetfx don't load since some of the file needed to proper functionality are not accessible (ie: they are packed in in a package)
I'm actually looking for some kind of graphic enhencements, and i progress slowly^^
btw, the once on the thread yo provide a link is not sweetfx, but rather Icecoldenhancer (this one use a DLL injector to do the jobs, and dll injestion interfere with the game itself in writing instructions in it, sweetfx have no injector, he just read data sended to match with the one from the GPU^^) and this one may trigger security lock due to possible hack (injection is a security threat)