Location Manager as Security Safeguard?

When OS X first came along, many of us were still using dial-up connections. When I installed Panther on my old blueberry iMac, a book I was reading suggested using the Location manager to create a so-called "offline" location so that the computer wasn't constantly attempting to dial up the internet when you didn't intend it to. (Obviously this "offline" setting wasn't a location at all but simply a way of turning off both of the "network port configurations": "Internal Modem" and "Built-in Ethernet" for this airportless machine.)
As I've upgraded to newer machines and software versions (currently the latest iMac and OS 10.5.6), I've kept on setting up the location manager this way (at present, "offline" renders "Ethernet" and Airport" inactive while letting "Firewire" and "Bluetooth" remain working). When I know I'm not going to be using my Mac (for instance while I'm not home or when I'm sleeping), I set the location back to "Offline." Yesterday, out of the blue, I suddenly wondered, "Why am I still doing this?" In the back of my mind, I guess I've been imagining a security benefit from this old "offline" habit: "offline" means my Mac is (at least for a time) not accessible to hackers via my cable modem, even though it is not shut down.
So (and pardon the long preface) my question is this: If I leave my computer running 24/7, as many who post here say they do, am I gaining anything by still creating an "offline" setting in Leopard and using it while I'm not on my Mac?
Before you reply, I should add that I've read many security-related posts in various forumns, and I've used the good advice. Specifically, I use a new Airport Extreme Base Station and have password-enabled WPA2 Personal encryption. I also utilize the obvious "General" security preferences: requiring a password to wake the computer from sleep or a screensaver, or to unlock a System Preferences pane; disabling automatic login; and enabling secure virtual memory. Furthermore, I have created separate user accounts (without administrative status) for general use, and I use a specific account with FileVault enabled for dealing with sensitive information. In addition, I have my firewall set to "Set access for specific services and applications," which at present only allows iTunes to communicate with an Airport Express (also with password WPA2 encryption) to use AirTunes. Lastly, I've enabled the "Stealth Mode." Well, I could go on: "Accept cookies...Only from sites you navigate to" in the Safari preferences. On and on. (Feel free to add to my list.) But, to return to my question, with all the aforementioned diligence, does such an "offline" setting in the Location manager serve any real purpose? Or am I just wasting my time?
In advance, thanks for taking the time to read such a long posting.

I created a singleton for this - seems to work quite well

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* Title: 
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Not sure. I am using a JList to do a very similar thing to you and it works for me. They share same datamodel so I thought it would work for you.
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Location Manager as Security Safeguard?

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