Abraham18: I hear what you're saying, I have 7 grandchildren and love them dearly and have gone through all the stages of child development with them -- seven times.
But we hosts are not being treated fairly when it comes to children. Hosts should not be asked to accommodate children under 2 years for free. Babes in arms, before they can crawl, yes, that's fine. But not toddlers: they create THE MOST work of any guest.
As a parent you know all about leaking poopy diapers, ruined mattesses from peed beds, banana-sticky hands on everything, spilled sticky milk from dropped bottles, the list goes on.
What we hosts object to is the expectation that these guests, THE most labour-intenisve guests possible, should be free. Frankly, I think children under 6 should be charged DOUBLE simply based on the amount of cleaning work they create.
When you choose to have children, you know they are going to be a lot of work and expense. That's your responsibilty. It shouldn't be our cost as hosts to subsidize your choice. Children should pay the same as everyone else, the're people, too!