Dear Inquiring Minds,
To answer your question; yes.
Giving the finger, or equivalent hand gesture, goes back to the dawn of creation. Some Biblical scholars are convinced Eve used it and that is what really started all the trouble. Or, if you prefer, it is why flippers and fins evolved into hands and fingers. You don't really need a thumb so this nonverbal "fuck you" can even be used by other species.
Back in the 60's there was a huge gorilla displayed in a tiny cage at the Snake Farm outside of New Orleans in LaPlace, Louisiana, USA. Stopping there was the highlight of any trip my family made when I was a kid. Whenever the gorilla was in the mood, she would crap in her hand and fling it at onlookers. Thank God for the plexiglass shield they eventually erected. With the shield up and the shit assault not quite as fun, to the horror of my parents and the delight of my Grandmother, the gorilla simply gave you the finger. I'm pretty sure she knew what it meant too. This is where I learned it.
I'm also sure I've seen my border collie use it a time or two. So I don't think an enemy pilot would have any trouble understanding the meaning of this salute as you are shooting at him.
I'm giving the finger mod two enthusiastic thumbs up.