Didn't his account stated with enough evidence clues that he was indeed impersonating his tagline,images,etc? Is there anything that says the opposite?
I don't really know
Incorrect. What_are_you ended up in the hospital for a decent amount of time, and during that time, WHO_AM_I WAS STILL POSTING! Don't believe me? Look at what_are_you's memes, you'll find one that explains how he was injured.