If people AFK for hours, it's taking up server space, *Looks at Art* so other members can't get on. I know that we rarely ever get max. capacity, but still, it's kind of annoying if someone AFKs all night...
As you say so yourself dood, it's not like the slots were full, and art checks the mobs every now and then so it won't lag. I think it's ok that he grinds, although idk why he does it so much, he's addicted to enchanting lol