Using PowerPoint in the classroom doesn't necessarily make you a bad person. It does, however, mean that your emphasis is on the quality of your presentation rather than your students' learning. It's in the nature of the beast. Certain demand characteristics of our environment make it highly likely that we will behave in certain ways. The concept of demand characteristics comes from experimental psychology the environment in which we find ourselves dictates, to a large extent, what we will do.
Any software is an environment with subtle demand characteristics.
The environment of electronic communication, on the other hand, promotes two-way communication. I don't mean to imply that it can't be used poorly, but as an environment, the demand characteristics of electronic communication are more likely to promote good pedagogy than will those of PowerPoint. The character of individual pieces of software makes it highly likely that software will be used in a particular way. In the case of PowerPoint, that way will usually create a teacher-centered classroom. All rights reserved worldwide.