Hm from a ethics side of view, to wipe out a inhabited planet is a monstruous and violent crime. It's basicly the worse action you can to do with enslaving people and eating them like cravers, or using population as disposable resource like vodyanis do. So i guess those two faction don't really give a fuck about  ethics, or they have a totally different vision of what is good and  what is bad. But the other factions don't look really interested about the crimes of vodyanis and cravers inside their own territories. 

In   the other hand, each faction react when another faction kills their civilians ships during war (including colonization ships, and explorers)  , even cravers ! So, actually, every faction react when  their civilians  are directly affected by war. When you destroy a  planet, you actually kill  so much civilians that i am a bit surprising  that the owner of the planet don't flood you with insults and threats.

From a strategic point of view, to destroy a system have some fair benefits. It's not costly. You don't have to capture and manage the system you destroy, and your ennemy canno't get his system back whatever how the war is going. It's the best way to make a ton of definitive damage to another empire without commiting your economy. Maybe empire's leadvers even respect that.

But in the other hand, it reduce the the living space, and the potential accessible resources of every empire of the galaxy. Imagine how poor a galaxy with half of its planet destroyed would be !   This is why from my point of view, even a cold hearted empire should react to a massive planet destruction. Not any empire care a lot about   how civilians of other factions suffer and die, but well, they could  use it at an excuse to condemn an abuse of planet destruction, just because they don't want to see their rich galaxy become a sterile desert.

Reading this thread, I think that even not receiving a mood message or any direct action towards you, when using a planet cracker, each faction will change their diplomatic opinion and reaction trend towards the one using it.

Think that this trend should change different for each faction, here my ideas of how they shoul behave:

Pacifist populations should be nervous too I think.

Moreover, as factions are capable of ideological shifts, diplomatic reactions might be based on the ruling party.

Schell wrote:

Hi Everyone,

As always, thank you for the feedbacks.  Normally, there should be a mood message from the AI if you destroyed one of its planets or in specific cases, if you destroyed the planet of someone else they knew about (nobody is gonna cry about a planet they never saw from a civilization they didn't meet... and Cravers will never cry for anyone, that goes without saying :p).

You should definitively have receive a notification in this kind of situations but if you didn't, please do not hesitate to send us a save, I'll take a look ASAP.

Cheers :)

I don't have a save but I surely never recieved such a notification.

thiasss wrote:

You're all making humans look so bad and cold hearted, as if they were all Germans. (based on UE reactions)

That's because all the humans are so bad and cold hearted.