I have seen several types. I believe there are those that do stop to weigh out the decision on whether or not to commit the act. Then there are those, the sociopaths and psychopaths, who lack that thing in their brain that we have which makes us hesitate and weigh out our options. For the one, the end always justifies the means. For the other it doesn't even occur to them the grief and hurt they cause around them.

Just the way I see it.