That's an excellent idea, Amber. As chooks has quite correctly pointed out, your own WiFi signal can be received as far as 100m or more from your router which puts you within access of not just your neighbours, but also anybody driving around the area looking for a stray WiFi signal to try to hack or piggy-back.

When I first connected my laptop to the WiFi router, I was horrified to notice that aside from my own signal, there were six others with more than adequate signal levels to which I could also connect had they not been security-locked, including 2 others from Optus, 2 from Telstra, 1 from Sky, and another simply classified as 'unknown'. Surprised the hell out of me, it did.