As I understand it, PCs can install this Art without aid from GMs but if another PC wants to remove it they need staff intervention. I understand why this is, to help protect the creative world building efforts of players from being destroyed off hand. But this, in my mind, supposes that Art is being used with the intent of adding long-term creative work to the game in a way that remains relevant over time.
Recently I have seen various pieces of 'art' that, in my opinion, are pretty much slander pieces against other characters that most of the dome doesn't even know about or care about. I feel that in some cases players may be using art because they want to keep other characters from removing their propaganda.
Again, maybe some or all of this recent art was seen by staff and approved or even coordinated with staff. Maybe the intent is something other than what I am personally interpreting. But, please, before hanging up art (especially in publicly accessible places) ask yourself if it really is long term art or just you wanting a 'sticky flyer' that other players will have to pester staff over when it ceases to be relevant.