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If there's one thing you can count on the internet, it's that everyone has an opinion and they aren't afraid to deliver their two cents. So when dueling billboards from Audi and BMW turned up on Santa Monica Blvd., the Photoshoppers got to work with what they felt would be appropriate counter responses. Some of those alternatives have turned up in the Fourtitude.com forums, a site dedicated to all things bearing four rings.

Now, Audi is asking anyone who's interested in chiming in to post their own alternative billboard designs on its Facebook page. If you become a fan of the page and craft your own response, RSVP to the LA Billboard War event. Attendees to the event can upload their images for all the Facebook world to see and comment on.

[Source: Audi]