I suspect it's easy when you live from day to day with nothing to lose. Most of us live with one eye on the future, sometimes years into the future. We can't comprehend doing things like that because of the impact it would/could have on us, our families, and our future. This is of course ignoring any moral implications one may or may not have.Not even sure how it's possible to get to a point where you have such a low regard for life to be able to kill with such a cavalier attitude.