What idiots! There are far more lethal toxins, far more easily obtained, and far safer for handling than nicotine. Any would-be poison-bullet creator would stand a much higher risk of killing themselves with pure nicotine than ever creating a successful weapon.
In contrast, metal-based compounds, such as those used for treating wood or anti-fouling agents for boats, are easily purchased from any local hardware store, and come in solid form, which makes them far safer to handle, and are thermally stable. There's also a wide selection of insecticides and rodenticides on the same aisles of the same hardware stores, all much more easily obtained than nicotine; also cheaper and with greater feasibility for whatever nefarious purposes... Picking on nicotine like this is beyond ridiculous, it shows nothing but rabid fanaticism and malicious persecution of nicotine users.