Query for webcam and AUDIO

Hi, i dont know if im the only one who notice that... but there is a big ECHO problem for the webcam AUDIO... if you dont use headphone speaker... you will hear echo from the other user you talk too... so the audio should not set at auto or always on... you shoud add a TALK button... this will reduce the echo problem... and i dont imagine what it will be with 50 user connect at the same time in the public chat with all the auto audio set on... the echo will be very lame.....