How about serve the warrant (if they have one) with a knock on the door? They used to do that back when we had a more civilized government.
And a more civilized bunch of residents. We have 20 million illegals here, a substantial portion of which are members of one organized crime cartel or another. We have home growns who are just as bad.
I really don't see the increasing caution by the police as being something they sought. I see it as a reaction to the changes that have occurred in our nation in my lifetime. They suck.