I've thought about that some myself--I've come to the conclusion that I have the potential to be cruel, given the right situation; but I've also come to understand that cruelty is something that literally anyone is capable of. It's not a matter of being a good person or a bad person; it's a matter of deciding whether to be cruel or kind. Things like this happen not because somebody is bad or insane; it's because, for a long time, they make choices to be cruel, until finally they become capable of doing something that would horrify the average person. Everyone is capable of becoming either a monster or a saint. Most of us end up somewhere in the middle. It all comes down to who you want to be.Stories like this actually scare me for for many reasons. I even scare myself, if I ever witnessed someone doing that... I fear I'd actually enjoy beating his/her head in, myself, with a baseball bat. Shiver.