are people with abnormal sexual preferences. They can be men or women. (women) or (men) are people who have committed sexual crimes. So, she can be and not a if she has abnormal sexual preferences but does not act on them. Japanese wiki explains this.
To me, when I use (women) or (men), I am not saying if their sexual preferences are abnormal or not but I am saying that they are doing something sexual in abnormal manners, meaning criminal manners.