oh they used to have a column in the bike papers.  Pictures of gored legs
If you slipped your pedals they would cut up your shins.

Have you seen the even more evil spiky Bear trap pedals.
Always wanted a pair of those circular bear traps.
Hutch made them for BMXs

shark bites are the worst, literally as if a shark has took a chunk out your shin if you slip on the pedal, they even come with a warning to wear shinpads