The internet, as I've said elsewhere before, is effectively The Lord of the Flies writ large. It is proof that, even in this modern world, if allowed to be immoral without consequences, a large percentage of people will do so. If it's not trying to hack into other people's systems for malicious reasons or for personal profit, it's stealing the work of others by the containerful. It's what the world would be without laws (and enforcement of them to some reasonable degree.) If you don't protect yourself, you will get whacked.
And yeh, these days there are people, often government or terrorist sponsered, who are constantly trying to create havoc, steal information, interrupt services and so forth. On top of that are lots of people who are anti-this or anti-that or just generally malicious who will do it just for the thrill of it, as well.
Eventually, either the internet is going to have to be tightened up, or it's going to cease to be a useful tool. And it'll be an interesting process because a lot of people will fight to the death to prevent it from happening, and they will be from a broad spectrum of interests. Such a tightening will likely make it far harder to steal stuff (and get away with it trivially anyway), and that in and of itself will cause a huge backlash. But I can't see how the internet can continue to become more central to our lives and still remain a completely anarchic system in which it is almost impossible to catch anyone doing anything to anybody.