I've always felt that "accept" should be the default response to being attacked. That way you get dragged in. If you want to leave, you still can. Having "forfiet" as the default leads to problems, especially when you are used to being in a fleet, where you don't even have the option to forfeit, and thus may get used to not even looking or clicking the option. I have had that happen many times. I forget that I actually have to go to accept a mission when I'm attacked, if I am all by myself. Should be switched without a doubt.