Last month the UK based charity, Sense About Science, launched a new campaign, called, yes you guessed it, Ask for evidence. They want consumers, voters and patients to "demand evidence for scientific and medical claims to counter a tide of misinformation."

They have some really good examples of "evidence hunting" including this scary one from Rhys Hunter:

I recently came across a miracle cure product being advertised on a Crohn’s disease support forum. This didn’t ring true for me, so I researched it on the internet and found a US Food Drug Agency warning stating ‘The product, when used as directed, produces an industrial bleach that can cause serious harm to health.’ I went back to the forum to warn others about it. I was then kicked off the forum. I reported it to my local Trading Standards who passed the complaint on to the Food Standards Agency. They sent the complaint to the European Commission. The World Health Organisation also became involved and warned about it. The Food Standards Agency banned it in the UK and helped get the UK-based sellers shut down.

Do you think we could get this started in the US as well?