On March 14th, online security journalist Brian Krebs was
cleaning his Virginia home in preparation for a small dinner
party when he noticed some plastic tape stuck under his front
door, left over from when he’d had to secure an extension cord.
Pulling up the tape, he opened the front door — and suddenly
heard a yell. "Don’t move!" the voice said. "Put your hands in
the air!" There were around 10 to 12 police officers surrounding
his driveway, guns drawn.  Fortunately, Krebs realized
immediately what had happened. He had actually warned the police
months before about the possibility of a fake emergency call
designed to bring a SWAT team to his house, an increasingly
popular prank among the young hackers he writes about. Still, he
was shaken.  "Things can go wrong very easily"  "Any time people
who are trained to respond to hostile situations show up at your
door pointing automatic weapons at you, things can go wrong very
easily," Krebs told The Verge. "I'm a pretty cool customer, as
these things go, but when