I am playing Cabal North America, Xtrap protection. I have found a way to prevent the char's number of combo announcement to the whole channel. I set my char to do around 30 combo then stop and start a new chain of combo. That way, there is no announcement of any of my combo.
Note: I used Qmacro to do combo and the combo-announce preventing method does not required any hack or bypass. The method can be done with Qmacro also.