Hackers profiling: Who are the attackers?

Who is attacking you? “We don’t know...” When talking about attackers and hacking it often happens that I ask people working at customer’s sites “who is scaring you?” Most of the time the answer I hear is not “Well, you know… I’m scared by script kids, playing with those couple of unpatched machines I have,” nor is it “I’m really scared about industrial spies.” Rather, 98% of the time the answer is “I don’t know.”