Looby, I have always argued for more information for formula feeding women - I am totally consistent on this.
But this has to be given ethically.
I think we should be open and honest about the health effects of formula feeding. This means letting all women know antenatally that there are risks with ff, not as a 'lecture' but as a dialogue, in which women can share their concerns about what 'method' to choose, ask questions, express fears about breastfeeding (people rarely have fears about formula feeding - but if they do, they can be shared as well).
Deliberately demo-ing a ff antenatally is not ethical as it normalises ff - and the normality of ff is one of the reasons why it can be harder to breastfeed. However, if someone was adamant they would have to ff, and had serious worries about how to do it, then I think individualised care would mean it would be acceptable to demo it - as a routine, though, demo-ing ff can wait until the baby is born. All the stuff about how to do it (see my post below) can be done postnatally - there's time to do it then, and when the baby is here, what is said just makes more sense.
Antenatal 'instruction' in breastfeeding is important, and ethical, because, again as I said, there is a very common lack of confidence, lack of belief, and huge mis-conceptions about breastfeeding, which it can be helpful to address before the baby is born - it can take time to build confidence and challenge mythology.
Of course ff mothers need information - I wish they could get the correct information more easily. Instead, the 'information' they get is a disgrace. They don't know what goes into formula; they are given recommendations for brands as being 'closest to breastmilk' (poppycock); they read ads and promotions on packs which give spurious health claims; instructions on safe preparation may or may not be given....I could go on