Did you know that the Misuse of Drugs Act gives the police powers of search and seizure without warrant?
The police can (and do) stop people on the street, or enter their homes to search for drugs. People have been stopped on flimsy grounds such as “I smell  cannabis so I am going to search you”
Nobody should be subject to unreasonable search, seizure, arrest and detention – yet thousands of New Zealanders have been subject to searches based on very limited grounds.