I've said it too many times to remember--teachers should not have to be saints. What I do in my off-campus time is no one's business but mine, except in very limited situations.
Firing a teacher for bikini pictures? A governmental agency that could do that could also fire you for showing up at the "wrong" side of a political rally.
Anyway, the woman in the story linked above has turned to porn to support herself. You've got to love this closing statement:
"So I told her, use ‘em before they fall to the ground. But God, does she need to work on her acting!"