It's What You Make of It

I don't see why this wouldn't be considered art. Obviously, whoever worked on this is had reason behind it and for whatever that reason may be, it holds meaning to them. Putting their work on a building is just the way they chose to express themselves and it may even add pupose to their work from their point of view. Whether or not you agree with this shouldn't alter your opinion of it being art. I, personally, don't think it looks attractive or find it interesting at all. I'm sure the creator sees it from a whole different perspective, though.