Iirc there was a HUGE thread about Pendragon doing it (and he even posted in it). Basically the guy decided to random and not be serious about his pick in Ranked and I think the reason why the random button was taken out of ranked. Something like that.
That is pretty old pic, considering MF and Ez both have their old splash arts/icons. Like....over a year ago old.
The Thread if you're really curious about the whole thing.