A recent and revealing example of this was reported on the RealClimate blog. An interview with a Polish climatologist about a hypothetical, but presently unlikely breakdown in gulf stream circulation, which would cause server winter in the northern hemisphere, results in a shoddy article entitled 'Scientists warn that awaits us, "Winter Millennium"'. This is re-reported, without any apparent checking of the source until it morphs in to claims of "Coldest winter in 1,000 years on its way".
It is picked on by the 'skeptical' blogger Anthony Watts on his blog 'Watts Up With That?, which will be known forthwith as 'Watts Wrong With That?' The premise of this