Risk aversion leading to "a nation of wimps"

From OpinionJournal:

SEESAW TORTS: Fearful of lawsuits, authorities everywhere have been stripping playgrounds of dangerous things like teeter-totters, swings and even sandboxes. Now elementary schools in Broward Country, Fla., have playground signs that read: "No running." One mother interviewed for the July 18 South Florida Sun-Sentinel fretted about her children and others being bored at playgrounds where the only unregulated activity seems to be grubbing in the dirt. But Joe Frost, who heads the University of Texas' Play and Playgrounds Research Project, looks at the problem differently. "Play is one of children's chief vehicles for development," the Sun-Sentinel quoted him saying, and "right now it looks like we're developing a nation of wimps."