This is great news!
A federal trial court in Chicago has ruled recently that the ancient legal doctrine of trespass to chattels (meaning trespass to personal property) applies to the interference caused to home computers by spyware. Information technology has advanced at warp speed with the law struggling to keep up, and this is an example of a court needing to use historical legal theories to grapple with new and previously unforeseen contexts in Cyberspace.
Now if we can just pass a law to allow summary execution of these people.
Hats tip to Ratboy's Anvil for this story.