I disagree. Tiananmen Square is a source of shame for the Chinese ruling party, and many of the people there are indeed aware of it -- moreso every day with the coming of the Internet.
and that may be the biggest success of the action: that the leaders have to live with a little voice inside them, telling them that they did wrong there. Depending on the person it could either make them into a total tyrant or push them more toward a democractic view.