User blog comment:763492/About one of Miku/Vocaloid fan videos/@comment-29714788-20160520062031/@comment-53539-20160520105237

Memes aren't really forced, a lot of the time their spontaneous and occur by random chance.

They have been a round for a while in popular culture, its just the internet allowed things to happen more often or widespread.

https://en.wikipedia.org/wiki/Kilroy_was_here