Flash bangs - as i was trained and used them - are for a room of people who may pose a threat and ARE FULLY AWAKE - so when it does go off - it disorients them so the team can move in...when people are FULLY ASLEEP - it is not needed - do to the element of surprise and people trying to wake up...
all these Call of Duty video games that are played don’t show the consequences of stupid decisions...just click on “restart” and away we go...LEROY JENKINS!
In this type of situation, the police would only have to have a proper warrant, surround the house and knock on the door.
If perchance whatever drugs. That might be there, gets flushed down the toilet could be caught by flushing the sewer system.