Not sure, but it would be good if they did; such an advertisement would only add, not take, from the South Park Neighborhood.
And anybody who thinks that such an object would divert a driver's attention on the Freeway is truly acting like a

. If that were the case, why not get rid of billboards alltogether; or for that matter, any object that can be seen from a distance? These people that complain are the same people that want to be able to see the scenery like the mountains, or the Hollywood Sign. HEELLLLOO?!