Ignoring all the fantastical abilities of superheroes, I’d like to point out numerous reasons why we don’t have, or want, masked-people perched atop buildings at night trying to help us.

Silicon Slaves

In a world where gut feelings are given more authority than facts, where the average person is permitted to drive 2 tons of steel death, and ‘God did it’ is an acceptable answer to why something happened, your life may just depend on listening to this podcast.
  The LogicallyCritical podcast is intended to encourage critical thinking in everyday situations without the hassle of checking facts at the library. Rather than quote historical research or bore you with statistics about how many dentists suggest what cigarette to their patients, this will use information that we can all reasonably agree on, and will show by example how to more-fully explore any given issue be it traffic, religion, or how to lure a weasel into a cardboard box.
  The podcast is no longer being actively produced (10/28/07), but the episodes are still available.