This is a fun idea that could could play in a ton of scenarios- but rather than staging/faking it, I think it would be funnier and more poignant to document two funny people really trying to avoid entire words that use "a"- and to do it as a competition. It would give it a really great viral-video quality, and a true feeling of fun & spontaneity that you wouldn't get from a scripted video, while still clearly delivering this important message to the viewer. Please see attached doc for more info.