I would say, what is probably ideal is one male, one female parent, simply as that is the natural means to create a kid.
But, the care of the child is the most important and if two parents of any gender can provide that care, its no big deal.
Kids get embarrassed over all sorts of things, and get bullied for anything and everything. Wearing glasses, being intelligent, being thick, height, weight, colour, being in a different school, having ginger hair, being gay, having one parent ..... having gay parents is no better or worse than any of these.
The gays that want to adopt or `create' babies are thinking of noone but themselves.
I would venture to say that pretty much all potential parents are thinking of noone but themselves. I dont know any parent who said they were doing it for the country, the human population, its always that *they* want a baby. Say its biological clock ticking, human nature, genetic impulses, anything you want, none of these reasons are going to be different based on your sexuality. No worse than IVF treatment for hetero couples, BB has mentioned issues with that, but that is seperate...
As for acceptance. Of course they are looking for acceptance, [edit] BUT [\edit] I dont think for a second that anyone would commit to everything required when you have a child be that time, money, or whatever just to prove a point.