So, let's say
L M S,
MNDuke myself and a few more people were in an 8player flatrate foggy on Napoleonic Europe. I'm holding 5 capitals and one of you realises it but can't stop me. You would under no circumstances mention it/ try to make others aware of it or try to rally support to stop me. because it's a fog game that according to you is unacceptable and I'd simply be allowed to win the game?
I'm not saying supporting either side of the argument so to speak, I'm just a little surprised that you two seem to be very firmly of the opinion that it's unacceptable. Personally I see it as a case by case basis. I've been in fog games where people have started using diplomacy, talking about who is likely to be strongest, needed to be stopped etc, without revealing exact positions. I've been in fog games on NapEU where the capitals were discussed rather freely in an attempt to stop someone stealing the game so to speak. In all such situations it has just been a natural evolution of the game, and no one has been outraged or thought anything wrong.
You won't find me beginning such in game discussions, but if others do I have no problem with it, and will get involved to tend to my own interests, using diplomacy, and a tad of misinformation if the situation calls for it. On maps where there are objectives I wouldn't think it too uncommon with such discussions.