American ships in British Convoys...fair targets?

[maillemaker]

The game will always penalize you for neutral kills.
In TWoS, American ships will become legit targets after first recorded incident between Germans and US Navy...https://en.wikipedia.org/wiki/USS_Niblack_(DD-424)
In other words, Americans will attack you significantly before official declaration of war (just like it was actually) but will you fight back it is up to you...

Well, I sank their butts!