They've done this simply by going out there and grabbing everything possible. To categorically state that hackers, phreakers, virus makers, or crackers are public enemies is bullshit. It's simply pointing to superficial factors and appealing to authority. It's reducing the problem to legal text. It's a senseless oversimplification.
Every law is constantly in motion - that's how it actually works.
You're one of the people that are obligated to change the law if you realize that it is wrong. For his or her own gain in the beginning, certainly, but still. And the university hackers - without them, we wouldn't have any of the computer technology we have today. All new ideas of any worth have emerged at MIT, Stanford, or Berkeley, by kids who've worked passionately for minimal pay and under uncertain employment terms. And most of them haven't earned a dime of profit from their inventions.