損人不利己

I really really don't understand why anyone would do something that is 損人不利己. Recent news and events have told me that people like this do exist. It's very disturbing and disappointing. Sigh. Natural disasters and accidents already ruin a lot of people's lives, why add to that through man-made means? Why ruin someone else's life when it really does you no good? I don't get it. What has this world come to?