As always when these topics are brought up with that sense of urgency, I will raise my hand and ask "Whose ethics? Unethical according to who ?"
A particular aspect of this ethical discussion is that the attitudes towards social institutions vary throughout the world, but the science is global - so any ethics criteria (or lack of them) for a conference essentially mean a "forced export" of these attitudes from one place to the rest of the world. For example, right now I personally am considering a particular ML research project in cooperation with our local p…
May I ask where that is? Because it could not be any location in the US.