Yep. The Mario question blocks put up by some teenagers in Ravenna, Ohio, in 2006 was a similar situation. https://www.eurogamer.net/news030406marioprank

A bunch appeared in our local park's hiking trail. Though I think it was an approved event based on some of the signage around at the time. It is a shame that unapproved ads can litter public spaces with little or no consequence, but not art.