I agree that the website element can spoil it. And I agree that no-one likes to be told they have to cook a meal for someone.
Most meal rotas are not like that - they are a few friends deciding to help out another friend - not because she can't cope or is having a crisis, but just to help out and show friendship.
As has been said before, it is fine to show friendship and help outside of a crisis - having a baby is usually not one, but that doesn't mean help or kindness has no place there.
In my experience,these rotas usually start after the DD has gone back to work - so are during the tricky time for a new mum of learning to manage alone.....yeah, yeah, they are still able-bodied and capable etc etc....taking meals isn't a suggestion that they aren't .....it's just recognition of a new phase and an act of friendship.
Some people have dietary requirements or major dislikes - I can see how websites in their attempts to cover these things might be a bit officious and impersonal. Friends who just put together their own rota usually know about these things (but might not know about partners allergies etc) or will simply ask....no need for a website.
I'm surprised by the amount of meanies on here. Some of you sound like a friend of yours would have to be literally dying before you'd offer any practical help. Is this attitude because you are mean, or embarrassed to offer help for fear of it not being wanted, or that you think people should have to manage on their own - I just don't get it, when we are talking bout friends.
I do understand that no-one likes to feel that a meal is an expectation or that friends feel entitled to it - but in real life, most people are not like that.
Please don't let the issues with websites colour your view of this whole area - helping friends is a good thing!