everybody's missing the point.
1) If it's accessible, it's visible.
2) If it's visible, people are going to poke at it.
3) If you poke it, it might "ACK!!! PHBBPPT!!!" and die spontaneously.
Being a programmer, and an old hand at MS-DOS and the Windows genre, I know just how little it takes for an unhandled exception to crash the entire system. And you never know what exception it will be until it crashes - that's why it was unhandled in the first place.
Maybe if they tried writing mathematically secure, compact device drivers for the electric grid, and made a tight, no-frills, non-Windows OS to boot it on, and kept it off the Internet (by using direct cable connections between sites), then maybe, just maybe it'd be completely safe. Until a backhoe driver cuts the cable and drops the entire country into darkness.
I tell you, the longer I live in this world, the more it seems we're heading backwards into candles and horseback riding.
We need a "Bill the Cat" icon. And a Pan-Galactic Gargle Blaster icon. Seriously, it's only one more row of icons. :)
Don't worry...be ACKey...