changing the vocabulary of adoption

As a rule, I'm not a person who is easily offended. I try to consider the motives and perspective of the person who says something questionable and take those into account and try to give them the benefit of the doubt. However, this one thing has bothered me since childhood and as I get older, I hear many well-intentioned, sincere people saying these sorts of things and I want to set the record straight, no matter how small my audience.

I've heard people say the following many times over the course of my life:

(1) "I think we'll have 2 kids naturally and then adopt another one."
(2) "We have 2 kids of our own and then are going to look into adoption."
(3) "Is your brother their real child?"
(4) Various newspaper or magazine articles denoting which child(ren) is(are) the adopted ones and which ones are aren't (see: Jolie/Pitt children)

As an adoptee, these comments/questions are offensive. They insinuate (1) I'm an unnatural child, as if I came by my family in a strange or irresponsible way (2) that I don't actually belong to my parents (3) that I'm just a placeholder for the "real" child that my parents were supposed to have, or that I'm in some way an imposter (4) that because I'm adopted, somehow my parents love me less than a non-adopted child that I need to be categorized as adopted.

I would propose changing the vocabulary to "biological" vs. "adopted", and using those terms only when necessary. If you're introducing a family, is it really necessary to say "these kids were adopted and these weren't?" unless it's for a specific purpose? In no way am I ashamed of being adopted. I'm rather quite proud of it. However, this has always bothered me to no end because it makes adoptees feel like second class citizens! Christians, in particular, should know better than to do this. In our adoption into God's family, does He loves us as second class citizens?

"According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love: having predestinated us unto the adoption of children by Jesus Christ himself, according to the good pleasure of his will, to the praise of the glory of his grace, wherein he hath made us accepted in the beloved." - Ephesians 1:4-6 (italics mine)

As Jesus purchased us with His own blood (which cost way more than even international adoption), I'd have to say no. We are "accepted in the beloved" as believers! What an amazing promise. Why can we be so insistent in our culture of dividing and separating that which is not meant to be divided and separated? This goes for many things above and beyond the concept of adoption, but adoption is one of the unfortunate casualties.

*Sorry that it's been so long since my last post and I'm posting a downer topic :)