I remember seeing a documentary with some nutty English woman who was breast feeding her 8 year old, yes you read the right 8 years old!!
As for where lines should be drawn. I would think those 3rd world countries that breast feed their children well into being toddlers are doing it as much out of necessity as anything else, with no other options available I'm sure I'd do the same if I were in their situation. As for health reasons, I choose to believe in modern medicine and research, otherwise I'd be running around with a bone in my nose and worshiping witch doctors too
I'm guessing a baby of around 0-12 months is probably more demanding and that to juggle their eating times would be more problematic, So the need to make an impromptu feed with boob out in public is more warranted. Even with saying that, the fact that we don't see many mums breast feeding in public tells me that it's not necessary to do so, unless there literally are no other options which is obviously quite rare.
For me personally I don't care if women breast feed in public or not, I'm indifferent to it rather than being pro or anti.
Something to ponder, as SLK rightly points out breasts have a duel purpose, so if we're going to be all tree-hugger-ish and say breast feed as long as you possibly can regardless of age, where's the line drawn between feeding and it being sexual
