Ia agree it isn't really worth wasting that much time over but people that say the creators don't think about that sort of thing are dead wrong. I just wonder why he was in Kalimdor at all if he erupted from Grim Batol, or did he erupt from the Maelstrom? In that case why not just go right to EK... I'm pretty sure he erupts from Grim Batol though because that's what the cinematic shows.
What I really want to know is why he bothers to go straight for SW and why the place isn't razed.