Thanks for sharing that link. This paragraph in particular jumped out at me in regards to all the efforts that have been made to rubber surface everything:

We might accept a few more phobias in our children in exchange for fewer injuries. But the final irony is that our close attention to safety has not in fact made a tremendous difference in the number of accidents children have. According to the National Electronic Injury Surveillance System, which monitors hospital visits, the frequency of emergency-room visits related to playground equipment, including home equipment, in 1980 was 156,000, or one visit per 1,452 Americans. In 2012, it was 271,475, or one per 1,156 Americans.