Jesus fucking tap dancing Christ!
If I had been that girl, even at 12 years of age, I would've told that principal to go fuck himself! At least then there would've been a REAL reason to punish me! It's not up to the school to punish her for what she posts on facebook outside of the school, that's up to her PARENTS! And I used to bitch and complain about people who worked in my school all the time, and never got suspended over it! This is ridiculous!
Girl, sue those bastards and change your facebook password, STAT!
Also.... isn't it ILLEGAL to interrogate a minor without the presence of her parents?