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.
You should read the article you are talking about. It wasn’t an ad campaign.
It was a bunch of teenage fans doing something creative for fun. Ya know, art!
Why do you think I didn't? I know the article is about art. My point was art like that should be welcomed or at least not prosecuted, as it seems advertising is today.