Why grief in blox?

As a builder in blox, I usually play in lobby 12 peaceful (pls don't make fun of me I just like building with adventure) and one of the things I notice is that in the spawn edge region is extremely dirty and messy full of floating pillars and a heavily greifed landscape. Of course, me (Peppyace) and some friends B0B & Posiden778 & LT_SHARCRYPTO are ceaning up the area and building pretty villages to at least fix the mess, but if not protected then in a matter of days it would be greifed. But the thing is, why?!?!? Like, why destroy some thing so beautiful? I just can't comprehend the motives of greifers doing this.