Wouldn't it be reasonable to observe the house for a while before a raid? That's where you pick up on clues as to who lives there. "Hmmm, seems to be a lot of

Wouldn't it be reasonable to observe the house for a while before a raid? That's where you pick up on clues as to who lives there. "Hmmm, seems to be a lot of small children here and not too many gang style criminals. Ok, team, we go in fast, but force probably won't be necessary." Oh, wait. This type of thinking would probably prevent the no-knock raid to begin with.