Re: Why not prompt for accelerometer?
Unless you killed the program once you're done with it, how do you know it isn't still grabbing your accelerometer data when you go to work tomorrow?
Even if you kill it, you don't, under the assumption that you are concerned with reducing the risk of it being malware. If there are examples in the wild of malware that keeps your phone running when you try to turn it off, then one that lets you think you have killed a process when you actually have not shouldn't be a surprise.