Don't think you're the first one to come up with that idea. Pentesters do it all the time, talks have been given at Shmoocon on it. The human race is easiest way to break into a computer/network. There are 2 constants
1. Use the dock door it's always open
2. Ask the secretary, they know everything
This attack was way beyond a switchblade. The switchblade is defeated by a simple guest account or turning auto-run off.