Eitherway if they dont knock that gives a person reason to blast them. I can see it now.
"I just saw a bunch of guys busting my door down in matching uniforms what was I suppose to think I always keep my 45 handy they should of knocked."

The thing about this is we have asshole cops around here and they will use and abuse this to no end.
WalkaWalka Reviewed by WalkaWalka on . Supreme Court upholds no-knock police search what's the big hurry to bust down doors and shout at people? can't the loving cops in black masks and stormtrooper gear who are protecting our freedom and serving us wait for just a minute? one step closer to the new freedom of dictatorship. Supreme Court upholds no-knock police search AP | June 16 2006 The Supreme Court made it easier today for police to barge into homes and seize evidence without knocking or waiting, a sign of the court's new conservatism with Samuel Alito on Rating: 5