Malum prohibitum - Wikipedia, the free encyclopedia "Malum Prohibitum" is a legal term meaning that there is nothing intrinsically criminal about a law, other than the fact that government has outlawed it. Basically something like digging up your own property and putting water lines down without a permit. This is considered illegal, but there is nothing criminal about putting water lines down as you're not hurting anyone. Another example the NRA give is this Now “malum in se" is the term used for a crime that is universally bad. I.e. Murder, rape, robbery, burglary etc... these are criminal as they have a victim and/or are hurting someone. What do you think about victimless laws? Where should the line be drawn? We can all agree there are a lot of laws on the books that are enforced that punish otherwise law abiding non-"malum in se" kind of people.