Use text an a graphic...

...to create a pleasing and yet informative message. You are to do one of the following:

make graffiti on a wall
put a disclaimers on a shipping crate
create a cautionary diagram on street a sign or instruction manuals.

Context matters!

Remember that you should do something that you have an emotional attachment. That is, if you don't care about dogs then don't make something about dogs. You should love or hate your subject matter. 

Also, consider how you will deliver your message should be delivered to your audience. Where would your audience be most likely to see it?