It's scarier than that; they were claiming that a TOS violation was enough to charge you under CFAA (unauthorized access, or exceeding authorized access). If that were true, being rude on a message board (that banned such behavior in its TOS) would be a criminal offense. It would be possible to charge almost any person with a crime for "hacking".

I prefer using the preexisting terminology for Twitter users, "twit".

She was charged under 18 U.S.C. 1030a2C; it prohibits exceeding authorized access to a computer to get information. One pertinent question is whether violating TOS, a contract between yourself and a corporation, constitutes unauthorized access. If it does, then it's a crime through CFAA. This is troublesome because few people read (or are capable of fully understanding) most TOS and because they frequently include "we can change this whenever we like". She wasn't charged for harassing the girl though a philosophical sense of justice demands that that was the crime committed. When activity falls into "a non-existing law area", it's not a crime. It may be later deemed a crime, but in America, you can't apply it retroactively.