在网络上匿名威胁隐私已经暴露的真人---电话骚扰、辱骂家属、强行拜访，是违反美国联邦刑法的。
（删掉的帖子，google都是cache的）。
Legislation against cyber-bullying
Main article: Cyberstalking legislation
United States
Legislation geared at penalizing cyber-bullying has been introduced in a number of U.S. states including New York, Missouri, Rhode Island and Maryland. At least seven states passed laws against digital harassment in 2007. Dardenne Prairie of Springfield, Missouri, passed a city ordinance making online harassment a misdemeanor. The city of St. Charles, Missouri has passed a similar ordinance. Missouri is among other states where lawmakers are pursuing state legislation, with a task forces expected to have “cyberbullying” laws drafted and implemented.[21] In June, 2008, Rep. Linda Sanchez (D-Calif.) and Rep. Kenny Hulshof (R-Mo.) proposed a federal law that would criminalize acts of cyberbullying.[22]
Lawmakers are seeking to address cyber-bullying with new legislation because there's currently no specific law on the books that deals with it. A fairly new federal cyber-stalking law might address such acts, according to Parry Aftab, but no one has been prosecuted under it yet. The proposed federal law would make it illegal to use electronic means to "coerce, intimidate, harass or cause other substantial emotional distress."
In August 2008, the California state legislature passed one of the first laws in the country to deal directly with cyber-bullying. The legislation, Assembly Bill 86 2008, gives school administrators the authority to discipline students for bullying others offline or online.[23] This law took effect, January 1, 2009.[24]
A recent ruling first seen in the UK determined that it is possible for an Internet Service Provider (ISP) to be liable for the content of sites which it hosts, setting a precedent that any ISP should treat a notice of complaint seriously and investigate it immediately.[25]
18 U.S.C. § 875(c) criminalizes the making of threats via Internet.