Generally I enjoy it, but there’s a lot of situations where I wish there was some sort of middleground between 
and 
Traincabs with windows covered make people feel so much more unsafe, since outside onlookers can’t see if something is happening inside.
I get sad when I see historical buildings with a bunch of tags on them. You might think that’s silly - I would imagine some do, since I’m personally cool with newer “uglier” buldings getting tagged. So if you feel like that about all buildings and can’t relate, try to take it to extreme examples: The pyramids with tags on them, terra-cotta soldiers with tags on them, cave paintings, nature reserves, animals… All of these have been tagged. If you find those apprehensive, then start from there and go as close to “pretty and old building” as you can get until you find it acceptable again. Hopefully you get where I’m coming from then.
I know graffiti and tagging is ancient - there’s 1000-year old tags in pompei (and on pyramids) but I think that’s a reductive argument. Our notion of history, culture, preservation and so on has changed a lot since the time of widespread slavery. Had the roman empire existed today, then I’d also be mad about a legionairy tagging the walls of Versailles.
On the other hand Brechts old theatre in Berlin, which used to be some big old royal theatre, has massive red X’s painted over the coat of arms that decorate the stage, and that’s cool as fuck. So it’s not something that can easily be categorized one way or the other.
But otherwise I love it. I love seeing the signs of an underground anti-authority art movement in the world around me. I love seeing the art. I love seeing how it develops. I love seeing advertisements covered. I love it when it’s pretty, I love it when it’s juvenile, I love it when it’s insightful, I love it when it’s political and I love it when it’s crude.
I wish there was some solution. I’d love to hear other peoples thoughts.
Grafitti and vandalism are themselves acts that influence the historical record and tell us about the world. We would know much less about Roman history, culture and the cultures with which they interacted were it not for grafitti and vandalism. You say its reductive to point that out, but I don’t see how it would be. A Varangian carving “Halfdan was here” on the Hagia Sophia tells us a bunch of things, chiefly that Halfdan was here. There was a Halfdan and Halfdan was in Istanbul. From this we can learn several other things, derived just from the fact that Halfdan isn’t a Greco-Roman name. The fact that Halfdan existed in the times of slavery doesn’t really add or subtract to what we are told. And the fact that the Hagia Sophia was already really old by the he did it doesn’t change that either.
Now tagging is by itself not the most interesting art, it’s just a signature. It would indeed have been cooler if he’d made some sort of cool subversion of Greco-Roman/Christian iconography in runic form or made some in depth artwork, but that’s a separate issue.