Wardriving: the act of locating and possibly exploiting connections
to wireless local area networks while driving around a city or
elsewhere. [techtarget.com]
Although this kind of tutorial is informative, I would have found it much better if it had been written with a 'how do I protect myself from war driving' prespective

Drive Boy, Drive!!
I don't think this does you any favours.

Security Talk

First and foremost, this should not be done on any network unless you
have full authorized access to do so. This is merely a tutorial, and
not a lesson in taking over a network.
Actually this is exactly what I read this as - a lesson in taking over a network.

So Plastic, how do I securem my wifi, what is a default SSID & how do I change it.

What can I do to stop people wardriving me?

These are the questions & answers that should be in a tut, & if I knew the answers I'd post them.