She said she's not bothered, not she likes or wants, which is a big difference. People have different levels of boundaries. People walk around topless on the beach or wear very revealing clothes etc. Doesn't make them less of a person. Just that their inhibitions are less than yours. If you judge that girl as "sampah masyarakat" just by this statement of hers, then you are no better.
The old pervert is the "sampah", not the girl.
I find this statement particularly disturbing as well. Even if she runs around naked, it doesn't give anybody the right to violate her in any way. Just because a woman likes to flaunt her body or have exhibitionist tendencies doesn't mean she wants, or deserves to get raped. It is the same as saying that if you wear a gold Rolex, and you are flashing it around, you are asking to get mugged. Rape is the most heinous of crimes, think twice before you think of slapping someone.