Security is in all our interests - except for the bad guys out
there. Bad guys use weak security where they find it to install
viruses or bots which are programs that hi-jack computers so that
rather than doing what you want (and paid for), your computer
spends time attacking other computers. As long as each infection
finds (on average) more than one other infect-able computer before
it is cleaned by up-to-date antivirus software, the infection will
never die out. Often these infections or bots are used to
test passwords to see if they can get into an otherwise protected
system. The following article is to a reasonably non technical
Microsoft document on what not to use as a password.
http://blogs.technet.com/mmpc/archive/2009/11/27/do-and-don-ts-for-p-w0rd.aspx
and
http://www.microsoft.com/protect/fraud/passwords/checker.aspx
As a matter of course, Ava (Agency software) will advise all
our customers if we find inappropriate password settings.