Yes, this happened to me too. I found a newly closed factory near where I work. We first explored it in october, the place was empty but still clean, despite the fact that people were squatting the last floor.
We didn't post any pictures online, but we created an entry in the UE Database, and then all hell broke loose. In less than 4 months, tags spread throughout every wall of the building! Not nice murals, just sloppy tags a 5 yr old child could have done better.
It really broke my heart when I went to visit it two weeks ago. I took pictures of the same virgin walls, now covered in tags, just to make a comparison.. it's heartbreaking. It sucks because the place has nice wooden floors, and huge fire doors but now they are all painted over.
Edit: corrected typos