Fewer people ride bikes; fewer children play outside after school. Movable basketball stanchions, once ubiquitous in driveways, are gone.
"You've got to very careful," he said. "Before, we didn't think about it."
Sitkoff said his pharmacy has sold grim supplies to customers because of neighborhood violence: more colostomy bags, for example.
One Latino mother bought antidepressant medication from him for many months after her son, an innocent bystander, was killed by a black gang, Sitkoff said.
"She didn't talk directly about it, but there's fear," he said. "How could there not be? I have black families who are the same way."
Meanwhile, the exodus continues. More black families depart every year for Palmdale or the Inland Empire. Some cliques of the East Coast Crips in the neighborhood don't exist any more.
One former black gang member said he hasn't left Florence-Firestone because he still has family and property there.
But "it's going to come a time when everybody's going to have to leave," he said. "Everybody's going to have to go."