Oh devil no. You didn't offend me at all.
I thought it was funny as hell. As I said, I didn't know anyone still knew about that joke.
Flipping someone the bird is giving them the finger.
Come to think of it, I only ever get upset when someone calls me a liar, or implies the same. That, and perhaps saying I don't know what I am talking about.
I try to make a habit out of being very versed in what I am saying. If I am guessing, or don't know, I will ask someone who does. I will keep discussing it until my understanding is as good as their's.
Bad information gets people into trouble, get's them hurt, or gets them killed. I don't like it when I get bad information, and because of that I try very, very hard to be sure of what I am saying.
So, anyway don't worry about offending me. It's a hard thing to do.
Romstar