On April 12, a Wednesday, a boulder-size concrete block was hurled at my car as I passed the Janie Poe public-housing complex on Central Avenue in Sarasota's Newtown. [The predominantly black neighborhood north of downtown.] It narrowly missed the windshield and, after swerving out the way of oncoming traffic, I hotheadedly pulled a U-turn back toward the 15 or so youths -- who appeared to be 12- to 18-year-olds -- standing in front of and just beyond the wall of an apartment at the edges of Janie Poe. I turned into 23rd Street and called 911, and several of the...