Signed into law last week, intentionally annoying someone on the internet is now punishible by fine and/or imprisonment of at most 2 years.
I can't find the law it clause in the law it pertains to....still looking
**EDIT**
Ah, the old law was re-written to include modern communication methods, but by doing so, they left the exact word "annoy" in the original law.
"Whoever...utilizes any device or software that can be used to originate telecommunications or other types of communications that are transmitted, in whole or in part, by the Internet... without disclosing his identity and with intent to annoy, abuse, threaten, or harass any person...who receives the communications...shall be fined under title 18 or imprisoned not more than two years, or both."