If someone would slap me in real-life one one cheeck, I'd slap them back on their both cheeks, kick their b*** and also their dog. Don't believe in all this "turn another cheek" thingie Lady Blue. It doesn't work. It's a cruel world out there, and Hammurab's laws work only (tooth for tooth, eye for an eye)
Now, regarding this issue - no one is flaming you or slapping you or something. They are just pointing out that the reason for alignment change is your own little evil act and that's it. Best way to deal with it is to live with it. When someone in my party dies, I don't reload. I resurect them, or waltz to temple if needed - after all, it happened in the legit way. Well, unless my main char dies, then I have no choice but to reload.. In any case, you did the act which changed your alignment, but still, why not to move on with it? Yeah some NPC might whine a bit more, but all in all it's all perfectly doable even with that alignment. You can move on and finish the game. I don't know though if it will give you some evil ending though, because of that.. Someone might know.