Is OOH advertising intrusive to our public social space? And if so, is the kickback against it (i.e. subvertising) justified?

Question

I'm Jed Small, 3rd year student at the University of Gloucestershire, studying BA Creative Advertising.

I’m currently in the middle of my final year dissertation. My project aims to assess the justifications for ‘subvertising’ – the act of covering, removing or replacing corporate Out-of-Home (OOH) advertising with parody pieces aimed at subverting the ad-spaces intended message. It will also explore the urban environment in which the battle between brand messaging and anti-advertising activism take place.

I'd love to hear some views on the subject from industry professionals and anyone with a passion for their outdoor environment.