This threat will probably be a hoax, but wisely the police aren't treating it as such.
Security measures have been put in place in retail outlets including the major stores in Wanganui.
Apart from staying tight-lipped about the threat and going about the business of checking product, there are good reasons for not panicking the public along with vital overseas markets.
Prime Minister John Key said making the threat public now only happened because one media outlet had got wind of the threat. From that can we assume if the media didn't know no one was ever going to know?
What if the threat was real and a baby did die? Would authorities have demanded a complete news blackout?
Hoax or not, Fonterra chief executive Theo Spierings is right to call the letters a "criminal threat" and "an attempt to blackmail" the country.