I myself am leery of public advertising with flyers in regards to this game. Fallout is intellectual property of what's-their-faces, and advertisement through posters in public places... uh, territory going that I would rather make sure would not get yourself, or us, in shit for. Might be nothing, but eh...
Nice motivation, but when you are using someone elses property, it should at least be considered, as it always should be when pondering such.