Hi, Huncowboy, and if I didn't catch you before, WELCOME ABOARD!
One of the things you can do is go into the Data/Cfg/Basic folder. Right at the top is the renown rewarded for different situations. I changed my neutrals to '0', on the grounds that very few, if any, kaleuns were punished for sinking neutral ships, especially in convoys. You can actually make it a positive, but I don't think I should be actively awarded for sinking them either, so '0' suits me fine.