I don't understand the new spin of a prank aspect at all. One of the perps got on the phone to 911 and threatened to shoot anyone that approached the home.
So how was it a prank?
This explains the 'hoax'. It's a game!
*****
Cops are fearful 'bombing' is fatal attraction to players
It's a game called "bombing," and police from New Jersey to Washington state fear it could turn deadly.
People make bogus 911 emergency calls -- sometimes using Internet technology to mimic the phone number of their unwary target -- and then boast online about how many SWAT team officers rush to the fake crisis with guns drawn.
http://www.nj.com/news/ledger/index.ssf?/base/news-21/1111643738249840.xml