Use of a teleprompter isn't bad. It's using it so totally that it puts into question the mind of the speaker and his ability to speak contemporaneously.
The man who needed TWO teleprompters to speak to a kindergarten class is the same man who was struck speechless when addressed by Vladimir Putin's lecture.
obama's speeches are written by speech writers so he needs a teleprompter to make sure he doesn't stray off what others intend that he say, verbatim, with no deviation. What would he say without the teleprompter? He's prone to stutter on his own and drift off into some world of his own where he sounds ridiculous. The teleprompter helps him hide himself saying only what has been predetermined to be what people want to hear.