In my Critical Thinking class, we deal with "Fallacies that Masquerade as Logic." If you teach Rhetoric or Forensics or Writing or Speech, you may deal with the same issues - like, for instance, the "Slippery Slope" argument. You know - if you give them an inch, they will take a mile, etc. I found some of the most entertaining examples for this logical fallacy in the Direct TV commercials below...
Don't Have a Grandson with a Dog Collar:
Don't Wake Up in a Roadside Ditch
While these examples "make visible" the rhetoric of such arguments, it might be prudent to note that some slopes actually ARE slippery, too.