They are?

Please see here:

http://www.k-otik.com/exploits/

and here

http://www.securityfocus.com/bid

etc...

Sure we can make people aware of the no brainers like using strong passwords, but beyond that, I am not sure how much your mum needs to know about securing TCP/IP in order to send an email, or the intricacies of SSL to shop online?

Probably easy to alter the technology then the ways of people...