Did you read OP's entire post? She states, and I quote, "My school's policy states that you can't take a picture of a patient or an activity."
Clearly she read the policies. It was the interpretation of the policy that is not clear. She did not take a picture of a patient, an activity, nor anything in a patient care area. It was a picture in a locker room. It is absolutely ridiculous that she was punished so harshly for this.
In my opinion, if the school wants to be THIS strict on social media policy, then they need to directly state that nothing shall be posted regarding clinicals period. Even in your own home. (As this was in a break area.) To me, this situation is no different than posting, "I got to start an IV today."
Certain judgement needs to be made when deciding what to duscuss outside of school, sure. But in this particular case, you only learn from experience and the benefit of learning from other's mistakes. I would have thought nothing of posting this myself when I was a student. I only know better now from experience and hearing other's horror stories. So maybe step down a little from that pedestal.