For those that have developed paranoia while blazing in a motel room, you have good reason. Many police in several or many states have the power to conduct non-specific warrent sweeps. You can google - "Quality of Life" motel drugs police sweeps - to see how many of these sweeps are conducted. For example:
"On February 2nd, 2005 at 1:00 AM the Pemberton Township Police Department conducted a Warrant/Quality of Life sweep at the Budget Lodge Motel, located in the Browns Mills section of Pemberton Township. Due to the high volume of drug, nuisance and trespassing related calls/complaints by the residents, area merchants and motel proprietor, police conducted the operation. Pemberton Township Police Sergeant James Wehman organized an eight officer detail to execute the Quality of Life Sweep. As a result, fourteen subjects were arrested and charged with various offenses. Thanks to the citizens of the community the operation was a success."