Imagine the polices surprise when they find out that those herbs were parsley not grass and that block of resin is actually brown Fimo modeling clay. Graffiti is great if it looks good, and terrible if it doesn't. But a witty slogan added to a sign or hoarding artistically, will cheer up passers-by and make them think. Why not paint small green leaves around your town, using a leaf-shaped stencil. If they brighten things up, people won't mind, and it'll force them to think of cannabis.
Lampposts are a good spot.
Let us know your favourite slogans, and we'll print the best. Turn traffic lights into cannabis adverts by sticking a round black paper stencil, with a hemp leaf shaped hole in it over the green light. Some current adverts might be worded so that if you add or change some letters the meaning is changed to a pro-cannabis message. If you can change them so that it looks unaltered, you'll make the general public do a double take. If you come up with a possible advert alteration, let us know quickly and we'll pass it on before the lifetime of that advert finishes.