Actually the safest way would be to have a reasonably secured network within close proximity of someone else who leaves theirs open. No one would bother cracking yours.

For example, this article states that children of alcoholics are more likely to have drinking problems than children of non-alcoholics are. Can someone with a background in psychology comment on this?

As mentioned in the article you linked to:

Both genetic and environmental factors influence the development of alcoholism in COAS.

In http://en.wikipedia.org/wiki/Disease_model_of_addiction/ it states:

Within the disease model of addiction, a genetic predisposition is believed to be present.

So, no one really knows, but alcoholism and addiction are believed to have a significant genetic factor involved.

Here is a link to a video of Jesse Sullivan with his bionic arm: WMV - http://www.ric.org/wmv/bionic_arm_BB.wmv RealPlayer - http://www.ric.org/real/bionic_arm_BB.ram