It's not bullying though, it's a prank gone wrong. She made a mistake and couldn't live with herself.n
It would be like, to pull from another thread as an example, the photographer of the man getting hit by a train killing himself.
She was ashamed that she was unprofessional in this circumstance and couldn't live with that (obviously I don't know all the facts, other issues, etc, just from what is being reported).
Bullying is a totally different animal.
"Life is full of beauty. Notice it. Notice the bumble bee, the small child, and the smiling faces. Smell the rain, and feel the wind. Live your life to the fullest potential, and fight for your dreams.