You've got criminal law, and you've got civil law.
In criminal law, youv'e offended the gov't and
can be prosecuted. Under civil law, it's up to
the offended party to sue you, and show that your
actions resulted in loss, or were a breach
of contract etc.
The Internet, being new, has very little criminal
law prohibiting specific acts. If disputing parties
can work out their problems with civil suits,
there will be no need for additional laws.
Of course, by analogy, all normal, real world
criminal law already applies to the internet.
Things like theft, conspiracy etc are already
illegal. Portscanning though, I think they'd have
to sue you, unless gov'ts pass laws specifically
prohibiting it.