lend v. Basham, 471 F.3d 1199, 1204-05 (11th Cir. 2006). "'The ripeness doctrine keeps federal courts from deciding cases prematurely,' Beaulieu v. City of Alabaster, 454 F.3d 1219, 1227 (11th Cir. 2006), and `protects [them] from engaging in speculation or wasting their resources through the review of potential