User blog comment:Matt Hadick/Win a trip to E3 2014 with Wikia/@comment-4623874-20140525014137/@comment-3448772-20140525142825

Well that's just how it goes for most contests. It would likely be a good bit more difficult for Wikia to include people outside the US. Also, if I remember correctly there are laws (in the US at least) that prevent people under the age of 18 from being able to collect the prize from such contests.