In this particular case at least - and any similar - I would think that MS is (at least partially) to blame.

Making an OS that has a port for a certain protocol (namely NetBIOS) available over another *by default* that exposes it to millions of other machines (namely TCP/IP via the 'net) is definitely NOT the way to release an OS that you are claiming is supposed to be so secure.

Who is "the admin" for all of those people who are just regular home users/gamers/students (with no real interest in computers, or anyone for that matter for whom the computer is just another tool?

The answer? Microsoft. Thus, this is their screwup - again.

When you get your license and you buy your first car, does the manufacturer/dealer hold you responsible for knowing how to fix the engine or rebuild it? No - you just have to know how to use the vehicle - ie: drive, add gas, check oil and tires. Just like how every casual (ie: non "admin-type" computer user) expects that with a computer, they need to plug it in, turn it on, maybe defrag it or run a virus scan every now and then, and use their favorite program/game on it... NOT be a network admin for it.

With the Internet "slowly" making it's way into everyone's house - and via faster and faster connections - and the large majority of those Internet users being computer users, default Windows setup should account for that.

Oddly though, each new release of Windows opens MORE ports instead of less - and also even MORE "accidental" back doors.

Interesting, my f-bulbs use only 1/5 the electricity and last 5 times as long. And they neither flicker at startup nor during regular runs. But I'm from Europe...

How to change a culture? Increase the price for electricity and inform people that there are cheaper alternatives (like properly insulating/designing houses instead of air-conditioning/electric heating). Give them a bonus, e.g. lend them money at 0% interest if they build to energy-saving standards. There are a lot of possibilities...