IANAL, but let's be real, it's essentially a DoS attack, which the Facebooks and Comcasts of the world have enthusiastically and successfully prosecuted in the past. In a perfect world, we would just replay any abuse-of-service lawsuit that they won in this area back against them. Without even invoking cybercrime, a quick search says that DoS against
private interests has apparently been prosecuted under chattel trespass and ToS violations, etc. I would think the government can take care of itself at least as well as private corporations when it's roused to anger.
Honestly though, public outrage alone may be enough to decide the case, since at the highest levels judges seem to ignore precedent and do whatever they want anyway. This isn't a low-level patent-troll making a living off a little light abuse of the system, these are billion dollar companies that are not only screwing people, but then getting us to pay for downstream effects as well.