The NBA isn't like college. Even bad teams are pros with players that belong in the NBA, also why point differentials aren't that wide of a gap. So anyone can get hot and not a whole lot can stop it from happening.
Playing down to opponents, that is true. We have had that issue in the past. Fred was "mic'ed up" on TNT when we played the Cavs. He was trying to drill the concept of "killer instinct" into players minds. In the context of what he was relaying(context is important, because Killer instinct isn't this scientific term with a strict meaning), it was to pour it onto teams while they were ahead. No letting loose. Good on him and I hope it sticks, because if you do blow teams out, before anyone gets sick of hearing it, you have bench players playing garbage time.