I don't really see the point. The sexing up of this story is quite mild by usual science reporting standards. Given how few science correspondents feel any qualms about spreading health scares which result in children dying of preventable diseases, I doubt they'll care much about the subtle point that 'B12 deficiency causes birth defects' + 'vegans one of the groups of people with a higher probability of B12 deficiency' does not equal 'veganism causes birth defects'. Seriously, whenever you hear a story which you know a lot about you realise that even the BBC's reporting is 50% nonsense and misleading. I've taken to getting my news from blogs and looking stuff like this up myself.