Bring Us Your Repugnant Ideas

We just did a Marketplace radio piece on “The Year in Repugnant Ideas,” and tomorrow we’ll release a podcast on a similar theme. We plan to revisit this theme in future radio shows and on the blog — as long as we don’t run out of repugnant ideas to talk about.
That’s where you come in. Please use the comments section below to tell us about ideas that you (or others) may find repugnant even though they might have a lot of value. To give you an idea of what I’m talking about:
In the Marketplace piece, we discuss the use of human wastewater for crop irrigation; the so-called “death panels”; and new solutions to the shortage in human organs for transplantation.
The podcast mainly focuses on the organ question, but also delves into repugnances past and present. For instance, take a look at this graphic from SuperFreakonomics Illustrated:

Thanks in advance for your great ideas.