Like we do with anything else:
These are crimes, but we are stuck in the mindset of the nascent Internet, when it was a growing experiment, a subculture in our society, harmless, and we wanted to nurture it and give it maximum freedom.
Those days are long gone. The Internet is completely integral to our society, like a major city (an extraordinarily large one) - in fact, anything not integrated into the Internet is on the fringe, like a business without a website. The idea of a harmless Internet has been antiquated for a long time; it is a serious place of serious money, serious criminals, and serious political actors.
Yet we still don't have serious law or law enforcement, not as an oppressive force but in the tradition of free, open societies. It would be like New York or Tokyo without law or law enforcement. We should create in the federal government (not state governments, given the Internet's borderless nature) a major domestic law enforcement agency, on the scale of the FBI, to protect people and enforce laws; I suspect we need a major addition to or revision of our legal code to go with it. That is how we deal with crime in other parts of society; the Internet is no different. We need divisions dealing with theft, fraud, destruction or property, invasions (hacking), etc. It's long past time to stop applying the antiquated notions to the current reality. Why do you accept this Wild West chaos; it no long fuels creativity and growth, it greatly hampers it.