Because pre-boarders are people physically (legally) unable to sit in the exit row, or DH/jumpseaters...the Exit Row is SWA's "First Class" and is reserved for the folks who paid for the right to get seated first. Only a colossal d1ck would call a FA a "b!tch" for enforcing that. That's like someone getting on a Legacy's airplane and taking an open seat in First without being offered it. D1ck move.