Originally Posted by TorchWood

Nothing is secure, it takes a very little Linux knowledge and a script to crack nearly all Wifi networks... From what I've heard its in fact common practice amongst "hackers" to do this and use your internet connection to break the law. So even if you lock it, makes no difference.

*knock knock*
87 year old woman with arthritis answers the door... "yeeees"
"hello m'am, we have evidence that you have hacked the pentagon, you're under arrest"