Your idea of shaming works only because you've had success bullying weaker opponents who back down, and appear to learn the "lesson" you're generously handing out.
Find an on par opponent and you'll get escalation of shaming, get your ass handed back to you with wit, or the person will just ignore you.
So I refuse that it's effective. It's perhaps been effective for you, self selective bias. You probably don't shame people you've sized up who won't respond to shaming the way you want.