This would be like the old school computing environment where you get an audible beep every time something is written to your hard disk. People noticed abusive code much more easily then.
There's been times I've seen the HDD light blinking and I've thought to myself "You're running remote-desktop right now. Why do you need the hard disk so much?"
Unfortunately it wouldn't work anymore, because devs will happily dump gigabytes an hour when completely idle...