Hey Curious D, you are right, but if a hacker gets you in his sights, I'm sure you are in severe trouble. In general, most of us are using the "sparrow" defensive strategy: when a hawk appears we all fly all over the place, and the hawk gets confused.
Security is so kids and fools don't bother you... if you have WiFi you are sending your info into the air and anyone who is an expert will be able to break your codes and other security methods. Just like with your cell phone... But if you have nothing to hide, and you turn off your computers regularly, and check for viruses and spybots, and unusual behaviour... well, I'd think you are pretty safe...
My brother decided to be fully secure, so he hardwired Ethernet throughout his house, and uses a landline for Internet connections....
Me? I prefer broadband and the comfort of WiFi...
Yes, I also kiss on the first date!
LOL
Good luck!