Though there have been many disturbing trends in the evolution of the App Store(s), this one is actually quite mild, if not welcome. Honestly, it's always unsettled me a little that any software can just start arbitrarily scribbling bits to the hard drive. (The system folder is protected, but my data isn't.) The concern is only a little about malware, and mostly about buggy code. All the sandbox requires is that apps…
That's a given.