The Communications Decency Act, which states in relevant part that anyone who communicates across state lines and who:
"makes a telephone call or utilizes a telecommunications device, whether or not conversation or communication ensues, without disclosing his identity and with intent to annoy, abuse, threaten, or harass any person at the called number or who receives the communications.... shall be fined under title 18, United States Code, or imprisoned not more than two years, or both."
Well, it's a good thing none of that ever happens.
Consider this an open thread. You know, as long as nobody's annoying. Whatever that means.