For myself, the best approach is to realize that these things don't really matter. The people who will read (and "enjoy") this fic, felt this way beforehand. You're right. It was actually penned to upset Spike fans. Therefore, my best response is to shrug and say it doesn't matter. As it's not the response that the writer is looking for, it probably upsets them.

At any rate, I understand why it irks you. It is irksome. Just realize that they look ridiculous and like a very poor fanfic writer.