I do not disagree with that. But some shippings do not land and some of them I shot down. It's not like you are completely safe from crackdowns if you only shoot down handful of shippings. Each of them could generate a crackdown.
About these extra crackdowns. Since I'm playing on the highest difficulty, they are going to start pretty soon, right? Are they going to be like other crackdown missions, where they try to find my base, or are they going to be base assaults every month?
Also somewhere around the third month, the Trade Guild decided to set up a secret base. These bases generate regular supply missions, right? So is it better to actually keep those bases operating and raid the supply ships, or are you going to get too much negative score/loose countries?