No because hacking generally circumvents the intended system design. The architecture of the World Wide Web explicitly allows for user discretion in fetching and executing linked content. There's no slippery slope from using a system within design parameters and executing malicious instructions on other people's systems without their permission and/or knowledge.

Good point. There is a distinction to be made. For fraud, we have those distinctions. If I send you an email that looks like an invoice for a service you already ordered, but is really, at closer inspection, an order form, I am still responsible if I planfully designed the email so that the average recipient would be fooled. This also means that if I send that email to grandmas I’ll be held more accountable than if I send it to lawyers. These are all important discussions. The ruling we see here just doesn’t enter such discussions, because the court hasn’t even recognized the problem.