YMMV, I guess?

This is about fandom writer's everywhere.
Fanfiction writer's are mostly women and a high percentage of those are teen or younger, so I understand that refering to a female character as a girl is pretty normal for a lot of them to say in real life
BUT
it throws me a bit when I read an ADULT WOMAN being refered to as a girl. (By adult men in quite a few cases too)

It's not even a rare occurrence either, but across the fandom board.
I'm almost guaranteed to find that (often a group of adult) women/woman will be called "the girls/those girls/that girl/the girl" by another character (usually male).


It's just... bah...
What's wrong with being a grown and matured woman?

He gave a grateful (A/N: That’s spelt right, just so you know. Yeah, it confused me too. I was like why is it that grate instead of the other great? It’d make more sense…but then this is the English language) smile[...]

You are now topping my most-useless-A/N-EVER-list.

And now I'm tempted to do a grate/great pun. Obviously I need to go to bed already.