sometimes you don't need to even see what people have done to tell what kind of person they are. you can see it on their facial expression and manners, and if they're horrible people, they're usually very creepy.
somehow, many people, instead of finding this creepy, will find it charismatic.
i remember this one time on a cruise ship i was on... some guy was having his way with a woman, and i got a glimpse of his face, and... two things became instantly evident:
1. this guy is clearly an asshole.
2. he has his looks with him.
3. he is highly confident.
4. this woman loves it.