[kordless]

I leave my keys in the car sometimes when I'm running errands in my home town. I care a whole lot more about my network security at home than I do my car. It's just a car.

[js2]

You are potentially exposing yourself to liability should your car be stolen and involved in an accident:

http://courses2.cit.cornell.edu/sociallaw/student_projects/E...

(IANAL, it looks like a court is not likely to find you liable, but you're still exposing yourself to the hassle of a law suit.)

[dfa0]

The reason to secure your network is a good reason to secure your car.

Your network and your car can/will be used by bad guys to do bad things.

You should care.

[MAGZine]

somehow i'm less worried about people stealing my car when I'm driving around at 60kmph.

[ticktocktick]

You are part of a society in which you have an obligation to protect and preserve the safety of others through reasonable and responsible actions.

I don't think that locking your car while it is parked or not leaving your keys in it while it is unattended is too much to ask.

FFS.

[kalleboo]

In my country, it's illegal to leave the keys in your car when you're not in it (a child could get in it to play and hurt themselves or others)