An unsecured wireless network is a dangerous thing. It's kind of like leaving the door to your car unlocked, or allowing your neighbor to listen in on your private phone calls. By leaving your wireless network open, any information that you send over that network can potentially be intercepted by malicious individuals. That's something you definitely don't want.
An unsecured wireless network allows anyone within range to use your internet connection, slowing down your personal connection and potentially driving up your internet bill. And if people start using your internet connection for illegal means, you will likely be implicated in any resulting investigation.
Luckily, securing your wireless network is a fairly simple task. We've...