Maybe I'm just old fashion and I do realize that many things have changed rapidly over the past decade or two, but what has always been a common courtesy amoung entertainers is to acknowledge their audience in appreciation for their applause, cheers or other forms of praising one's performance. Karaoke, is no different in my humble opinion. It may not be for pay but nonetheless, if someone has taken the time to listen to your work and leave a kind comment, some form of acknowledgement by the performer, be it a thank you or other response, is also the right thing to do. Just one man's opinion...... Thank you..