Someone sick and pretty cowardly.
Drug or alcohol abuse is involved with mental health issues.
People who would be proud of such a thing are the type who enjoy being opposed. Rebels without a cause. Those who think its cool to ignore blatant humanity, intelligence, or empathy.
...There are people who do that? That's a bit weird.
who are you talking about? what happened?
They probably don't think it's cool at all. Clearly there are impulse control issues. These issues may be aided by drugs or alcohol or both. This particular person might be very unpleasant to be around.
Sounds like an average day where I used to grow up. Hm, nothing surprises me with humans anymore.
Never done it before?
Well, I am sure someone would have to have no conscious to do such a horrid thing.
Read some History, You may learn something about human beings.