I have to agree with Hobb here. As long as it doesn't break the rules and there is actual content present, what's the problem if a diplomacy post is not serious business italicized "by the power of greyskull, we are trampling out the vintage where the grapes of wrath are stored" style nerd tripe? Last I checked, this was cRPG and not Persistent World, Napoleonic Wars, or some other terrible mod filled with RPers and their ilk.
Add to this the fact that a.) a new thread on the same topic will be made as soon as either side wants to gloat or put a positive spin on one of its losses and b.) this is probably the most relevant/important news on NA in at least a month, and I really can't say that I follow your reasoning in moving the thread to spam without any warning.