Prevent is based on the idea to not give up a big play and instantly let the game become close. Burn the clock ...
A good offensive drive is actually the best defense during any part of a game when you have the lead. Just like prevent defense ... most OC go conservative when they have a 2+ possession lead because they do not want to turn the ball over. I find it more frustrating to watch a high powered offense go ultra-conservative ... 3 running plays and out ... punt and give it back to your prevent defense.