Whatever happened to knocking? Early Wednesday morning at a home in west London, police used a digger—yes, one of those big construction trucks—to smash through a perimeter wall, then proceeded to use sledgehammers and angle grinders to get into the house to search for drugs. They probably would’ve used a battering ram if they had one handy. This was all part of a larger bust involving 500 officers who raided 30 homes and businesses......