They themselves "leaked" the command or it somehow spread. But when you actually typed that command, it would minimize your Wildstar client, open your browser on a youtube video of a Rick Astley song and play it.
I am level 50 already and I am thoroughly enjoying it. I speed-leveled and now am going back and doing all of the path stuff. There is a bit of level 50 content (Daily island, veteran dungeons, veteran adventures, PvP, Warplots, Raids). The level 50 veteran dungeons are not puggable at this time as people have no idea what the hell are doing and DPS think they are faceroll everything and just take all of the telegraphed damage and survive. WoW habits FTW!