As sugessted above don't throw them. They will keep bringing more and counting them as placements. This is prime advertising space to educate the public by placing stickers and raising awareness. I just made some this afternoon with QR codes (quick read codes). Smart phones can scan them and watch instant videos or go to websites such as the ones mentioned above. If people are waiting in hospitals or laundromats it is a better use of time than reading those rags...
I can email you the template or I am happy to mail you the stickers themselves if you would like. Send a private message if you are interested.