... Darth Vader ...
... and, that's about it actually.
The decision to disguise one's voice is more of a stylistic flourish, usually favored by kidnappers and serial killers. Foreign terrorists will usually address the FBI using their regular voice.
Even if they can do a perfect American accent.
#5. There Are No Such Thing as Area Codes
New Yorkers might be smart enough to remember seven digit phone numbers, but they're clearly not smart enough to remember that metro areas with more than 9,999,999 people require more than one area code.
In Date Night, Tina Fey and Steve Carrell sneak behind the desk of the hottest restaurant in Manhattan to find that the restaurant only keeps the last seven digits of a given phone number, apparently preferring to guess whether they should be dialing a 212, 646, 917, 718 or 347 first.
#4. Videos Posted On YouTube Will Be Watched By Millions of People (Immediately)
Video of you doing something mildly embarrassing will rack up millions of hits in a few hours, regardless of how uninteresting it might be to a stranger. As long as it's embarrassing for you, people will find it fascinating.
Glee, the young hip show about kids-these-days showed they were down with the internet when the kids find a video of cheer-leading coach Jane Lynch jazzercising, and post it to YouTube. Not only does the video make the rounds at their school, it becomes a national phenomenon, and leads to a duet with Olivia Newton John.
"My friends must know about this unattractive stranger doing something unremarkable!"
= How the Internet works