It is not only graduate students and younger professors in philosophy departments who are subject to harassment from male professors. Many of us who do not stay in academia end up on its periphery, as editors, journalists, independent scholars, activists, and in other roles.
It is decidedly not uncommon to be harassed, even stalked, at APA and other conferences. When one’s role is editor or journalist, for example, one is in the unenviable position of having to interact with the harasser at a press booth or in an interview room; one’s job requires it. This can lead to repeated uncomfortable incidents, and there is no recourse that I am aware of.