What is it with people and rocks?

Headed to Salvation Army on a break from work, I glanced through a wrought iron fence I'd looked through before, and saw something I hadn't seen before: a few rocks, stacked up. I continued on my way but, amused, I took a picture on my way back. It's either artsy or crappy, I'm not sure which; I took it with my cell phone, forgive me.