So, you think the "prank" would have been an issue if the f/a was male??
IMHO, the very Culture of SWA lends itself to these occurances, "work hard/play hard", the problem being that not all of the players want to play.
I think the pilots were guilty of not knowing their audience, especially in this day of cell phones that take pictures. Time off to think about it, yes. Termination, no.