Some interesting points here.

From a theoretical point of view, I take issue with the position that "I was inconvenienced. This is my way of getting back at the folks who inconvenienced me."

Those are two issues. Being inconvenienced is one thing. Asking for double miles in a situation where you know it's against the rules, you know you'll probably get them, and you know you will almost surely not get caught, is something else.

When we are inconvenienced in other situations we do not define our own redress and take it. When we have to wait in a long line at a store, we do not feel that justifies putting a pack of chewing gum in our pockets. We may say something, but we do not steal anything - no matter how small - from the store as self-defined revenge. Do we say to a storekeeper "I waited so long that I ate one of your muffins; I won't pay for it because I deserve something and you should give it to me for good will so I'll come back?" Why is it only with FF miles that we use this "I deserve it because of what I had to go through" logic?

I'm no saint. I'd probably take the double miles. However, while the $$ involved may be trivial and the thrill of the miles chase may blind us to the bigger issues, it's good to think about them once in a while.