while i understand this and agree, i have also needed to shut down certain apps this way that were misbehaving, such as the Facebook app. if it’s acting up, the last remembered state of the app is still in the hosed up state.

Emptying this list of applications is simply needless, mindless, busywork. It was absolutely never intended to be used this way and anyone who does this is just wasting their time.

via Daring Fireball: You Do Not Need to Manually Manage iOS Multitasking.