That is because no matter what happens, when politics gets discussed, people get emotionally charged, they turn into flame wars. I had my fill of that BS over at SimHq and I do not want it here. It is not unfair or unrealistic, it is our site, you agreed to rules to become a member of the site, therefore we can dictate what is discussed and what is not.
On the other thing, people just get tired of answering the same questions over and over and over again. A search button is a wonderful thing. Chances are a question has been asked and by using said search button you will find it. God helps those who helps themselves. Finally some people who start a thread want to keep it on the topic they have started. (I am guilty of derailing a thread out of fun many many times) If they are talking about Super Hornets, maybe they don't want to talk about the Tomcats. You can't make blanket statements saying that it will inevitably move on to Tomcats. Because if that is not what the topic starter wants to hear, it is well in their right to say so.