So many hypocrites in this thread.
When you change your signature to your real name and post on the window of your house, or your lawn if Mum has one
, your job. Then you can start criticizing those who are best keeping these things very secret, not doing it at all or those who are shocked.
She made a stupid choice and the authorities rightly think she's no longer suitable to be working in a school. She should resign or be fired.
sucks but that's the real world, she's clearly now unsuitable to be working in a place with teenage boys there.