@talk72000,
I've no idea if staring is a crime anywhere but I can see entrenched staring as a clue to psychopathy (general term), mentioned earlier in the thread. Sorry no quote, psychopathy wasn't the word.
On the other hand I can see it considered as a cultural mode of extreme flirt within that culture. Not for most of us, but I get that is a mode, which I'm not sure I just buy as the mode.
I think staring does vary.
Whatever, in the workplace, this is way out of line.