Simply looking at an individual ONE TIME is not enough to support a claim of sexual harassment, true.
But doing so multiple times can. From what the poster says, it sounds as if there have been multiple incidents.
Besides, the question was not, Did I commit any form of harassment. The question was, does it matter if I was not aware that I was bothering someone. The answer to that question is no, they are not automatically immune by virtue of a claim that they didn't know they were bothering someone. If that were a valid defense, all anyone would have to say is, oh, I didn't know I was bothering you, and the claim would magically go away.

