Guys, guys, it's totally for security and safeguarding a healthy, non-toxic community. Absolutely NOT to gather data which we can then later resell behind your back to 3rd parties for huge profit.
xD
ssling: StarCraft 2? I don't think it was any more online service than Warcraft 3 with fully offline single player.
rtcvb32: Wasn't it, that unless you were online you couldn't save/load your game among other annoyances?
The moment you disconnect/unplug the internet when the game is running, you are constantly being pestered by the "You are offline and can't earn achievements" message and every loading screen in single player will boot you to the main menu and you have to reload the save manually again every time.
It is playable, but they went out of their way to make it as annoying as possible to do so.