In the spot on NPR, they talked to the falconer who handles the raptors. They asked him if this would spell the end of the pigeon-scaring program. No, he said, he could equip the falcons with little gloves, so they couldn’t take prey.
By the way, for the sake of the factual, the name Pigeon Hawk is outdated. They’re now called Merlins. There is some confusion over whether the name Pigeon Hawk derived from diet ( which includes pigeons to be sure ) or their appearance in flight.