First, how could something this horrible happen at such a high level at such a prominent company?
In my last job I had an opportunity to work very closely with the executive committee of a Fortune 50 company.
Before I started the work I thought "wow, they must be so smart, I'm going to learn so much!". What I did learn is that the people at the top are really no different than the people at the bottom.
Yes, there are some very smart and productive people. But there are also people that make you wonder how they got there.
The fact the eBay CEO decided to harass the crap out of someone is not surprising in the least.