I got a guy fired from my part time job, should I feel bad?

I work part time at a restaurant and there was a guy who worked there who was 24 years old. All the female employees complained about him because he was your definition of a typical douche who gets a bit too close with the females there when it came to his hands. But since I never actually witnessed his behavior I just thought they were making it up for attention.

But the other night one of his friends come in and his friend and the employee who got fired, slapped one of our 16 year old hosts right across the behind. They both did and proceeded to make comments about her arse. She scurried out of there, trying to get away. This host in particular told me that he does this all the time and also harasses her over text message trying to get her to have sex with him. She showed me the texts in question. Since I finally saw first hand evidence of this harassment, and as well as the text messages, I reported it to our general manager who then fired him.

A lot of people are mad at me at the place for snitching. It makes no sense - all the girl employees said they hated him, but at the same time are mad at me, and also tended flirt with him a lot. Should I feel bad? I don't, because if you are 8 years older than a 16 year old and are sexually harassing her you get what you deserve.