Given the nature of the website and the profile of the people who would be likely to post there, I doubt it was some bored teenager.
She was in her mid-50s when she passed, and was a very accomplished internationally renowned award-winning classical musician. She was also head of the music department at a well-known Boston area university.
The hundreds of people who post at this website were family, friends, professional colleagues and students.
My condolences.
I am saddened you have lost someone dear to you. May you and her family keep her in your hearts.