A group of Redditors on the WallStreetBets board have been having a heyday driving up the value of a handful of stocks (along with the cryptocurrency Dogecoin) to stratospheric levels. The news has covered the social media angle, the Pandemic day trading angle, and the whole thing as a war of individual investors against hedge fund shortsellers, among other things. 

Does this tell us anything about markets and market efficiency or is it just a sideshow? Explain.