It's harassment if undue attention is payed to the infractions of a specific group over society as a whole. For example, if my office had a policy that everybo

It's harassment if undue attention is payed to the infractions of a specific group over society as a whole. For example, if my office had a policy that everybody should wipe down the microwave after using it, it wouldn't be a problem if that rule was enforced across the board. But if there was someone in the office who hid behind a potted plant and watched specifically for me to microwave my food so they could catch me in the act, and if I noticed that they seemed to only care about my food and no one else's, and if I noticed that even when other office members did the same thing next to me that I was still the only person who got in trouble -- at a certain point it would be reasonable for me to assume that this was personal, and not just about the microwave.