Most people aren't even wearing bullet-proof helmets when they sit next to a window leaving them totally vulnerable to snipers. They get what they deserve.

Not sure if you were joking, but you are right:

http://en.wikipedia.org/wiki/Lock_bumping

That, and good ol' violence.

He isn't advising you don't need to lock your house because the locks are insecure. He's just pointing out that you probably shouldn't lose sleep over if someone can break in or not, especially when windows are easily broken.

In general, home locks aren't to keep people out. They're to keep people honest. For everything else there's insurance.

Precisely. And much like burglars, people trying to access your WiFi fall broadly into two groups; those who want to access any of the WiFi in the area and those that want access to your specific WiFi. My guess is that in the vast majority of cases it's the former and as long as your 'locks' are better than your neighbours you'll be fine. However if it's the later, then just like burglary you've entered a whole new problem space.