Too close for comfort

I was just watching the news and in Australia (where I live) there have been about 16 cases of suspicious packages found on the East coast, in Townsville, Brisbane, Sydney, and Melbourne. Apparently none of them contained traces of Anthrax, but this is getting too close for comfort.

Each was found to contain a white powderish substance. It could be copy-cat hoaxes, but still this is getting scary.