Dirty bombs aren’t really a thing one needs to worry about. Getting enough material to make one would require industrial nuclear material handling processes, ot

Dirty bombs aren’t really a thing one needs to worry about. Getting enough material to make one would require industrial nuclear material handling processes, otherwise you the bomb maker would die. Nuclear material heavy so it’s hard to get it up into the air, you’ll need a large bomb probably truck sized. So at this point you need to drive the thing around. Remember this thing is very radioactive, so you’ll need to shield the driver or they’ll be cooked before getting to their destination. You also need to avoid detection, and you won’t so you’ll need to work fast. Then once you blow up most of the material will fall out of the air really quickly, so you’ll want it somewhere populated like a city. Unfortunately all of the buildings keep the material from hitting many people, and anyone so unfortunate can just shower and take some iodine tablets. The explosion itself will cause most of the damage. Once you’ve done this to little effect, the wrath of the whole world will fall on you for breaking this taboo. So it’s really not worth the trouble.