Sometimes, you have to know your staff to know where you really need to file a harassment complaint. Some people will be more sympathetic and interested in doing the right thing than others.
For instance, we don't exactly have a human resources department. If I needed to file that kind of complaint, I'd go to the executive secretary. She's the president's secretary. I've known her for years, and I know she would follow protocol to the letter.
Sometimes, the harasser has no clue that his or her behavior has been objectionable, and that's really sad. That happened at my company. The harasser couldn't think why anyone would file a complaint against him. Mostly, it was his complete lack of couth that made him say things to the female employees that were inappropriate. There was no malice in him; he was just completely socially retarded.