Kinda feels like a loophole if you can just specify an exact scenario where it never affects the wrong people, idk but if I was making a system of morality it seems weird that people could escape arson being bad by saying "I only mean arson against bad people", I'd probably have to revise that if I were Kant and this is how his morality works.

Edit: Didnt Kant have like an example where you have a duty to never lie for moral reasons even if the specific situation would outweigh the negativity of lying with the positive effect of the lie?