Also in today's Reddit Digest: ancient massacres, the most disastrous presidential campaigns, and where light goes when you turn off the lights.
Also in today's Reddit Digest: guerrilla warfare, a theater owner AMA, and sci-fi movies that show mankind's true future.
Also in today's Reddit Digest: Reddit bomb 2.0, why fire wiggles, and how to fix a zipper.
Also in today's Reddit Digest: How it feels to cut from the NFL, the history of Reddit, and grammar nazis
The YouTube sensation was barred from Reddit's /r/IAmA due to a rule that discourages "memes" and Internet celebrities from answering questions there.
Plus: the origins of surnames, what a Mitt Romney presidency would mean for Reddit, and life's worst reality checks.