- Broken Base:
- The whole "no politics" thing. While some fans appreciate the apolitical aspect of the show, some fans are quick to point out that neither economics or social issues are immune to skeptical inquiry.
- Related to the above is Penn and Teller's position of number one in the "Top 10 Best Pro-Science Celebrities" episode. Although no one doubts that P&T are steadfast supporters of science, they are quite controversial among skeptics for their fringe economic beliefs.
- Critical Research Failure:
- The DDT episode, which was heavily criticized by the Skeptical community.