Mmm, I understand your examples, but I can't see the issue being the interchangeable interpretation of the word Child-free, for example, when someone thinks they should get priority holiday at Christmas. That's just being a dick. Irrespective of who wants to use which label.
The one that made me think more, was "I know what being childfree for life is like because I was childfree until I had kids"
Because you find this unreasonable, and I find it totally reasonable, simply because the word means different things to each of us.
For you to take offence, it would have to be me saying that statement, but with the meaning you attribute to it, which would not happen, because I would only be speaking in my context of what the word means. (This is a right pickle to explain, I hope it makes sense)
You attribute, permanently, positively decided not to have children. I attribute, without child.
I would be saying "I know what being childfree without a child for life is like because I was childfree without a child until I had a child"
Now whilst that's terrible grammar, I'm literally saying, I know what it's like not to have a child, because I didn't have a child.
In your interpretation of the word, that statement becomes "I know what being childfree a person who has decided to never have children and feel positive about this for life is like because I was childfree a person who has decided to never have children and feel positive about this until I had kids"
Which you would never say, because it's a complete contradiction in terms, and I would never say because of the same, and also it's not what I take the word to mean.
So whilst you hear the latter, because that's your interpretation, I'm saying the former.
Yes? Clear as mud? 