What annoys me more than one of my kids deleting (or almost deleting an app) is that they constantly push the home button in the middle of playing a game. Then they are lost amongst all the icons to get back to what they were doing. They hand it back to me, I open the app again, get back to where they were in the game, hand it back, they play for a couple of minutes, click the home button, and the cycle repeats itself until I get too frustrated to deal with it.
A way to disable the home button would be nice.