"It's like Unix!" people say. "rm doesn't warn you, either!" Reminds me of one of my common complaints about that response. The difference is that 'rm' doesn'

"It's like Unix!" people say. "rm doesn't warn you, either!" Reminds me of one of my common complaints about that response. The difference is that 'rm' doesn't do anything but remove stuff---it removing things isn't surprising. If a command has multiple potential effect types, and only some of them are destructive, then good UI would offer a warning.