Threads like this are destined to go sideways from inception. It started "going berzerk" before she deleted the OP. Though, I'm not clear on what your definition of "going berzerk" is here. I don't think it truly went "berzerk" at all--not in comparison to some threads here. The OP kind of went "berzerk" when she discovered that people didn't want to play along. Derailed? Yes.
Besides, just because the OP deletes the OP doesn't mean that the thread is just going to suddenly die...the tangential conversations often continue for a fashion and eventually just trail off. It's normal.