Ah yeah, on the thing about flame wars, I believe this has to do with... US in the game.
If it's just Soviet and Germany then it would be fine, but whenever America is in flame war tends to happen.
I still don't know why, but america stuff in the game somehow invite more arm-chair general/historian to the debate. They somehow forget this is all just a game, and want to correct it like how they have reseached. This happen on the early day of World of Tank/World of Warships as well and there's no way for you to actually control it.
You could even go as far as when the anime was still airing, heapload of "WILL THERE BE AMERICA SHIPFU IN THIS GAME" question were asked.
So about that, I believe the answer is, you can not avoid it. No one really respect others' opinion on the internet.