For example, Sehwag. When he comes in to bat, a deep point is set in place. This is not a negative tactic because Sehwag isn't the player that can manipulate the field by pushing ones to that man, so you cut off his release zones by letting him get a single out there. It's more risk to play that shot because his reward is one run opposed to the reward of four if he executes.
For spin bowlers, it is not a negative tactic to have players deep down the ground. That cuts off that shot and instead gives the bowler confidence to throw the ball up because he knows it's not a wicket/four/six situation, all of a sudden it becomes a wicket/single/six (though this risk becomes huge) prospect.
In India for example, you need to get wickets in front of the wicket. You plug boundaries to choke the scoring rate and then bowl to plans and wear them down.
Being 'aggressive' isn't always the best way to get wickets.