As Walmart moves to phase out its familiar “greeters” at some 1,000 stores nationwide, disabled workers who fill many of those jobs say they’re being unfairly targeted. Walmart told greeters around the country last week their positions would be eliminated on April 26 in favor of an expanded, more physically demanding “customer host” role. That came as a heavy blow to greeters with cerebral palsy, spina bifida and other disabilities. Now Walmart is facing a backlash from customers and employees.