I think you see where this is going. I was going to say that every single game I've seen him play today he's gone afk in, but since he's been warned four hours ago let's hold that as a cutoff point. Games:
http://zero-k.info/Battles/Detail/806942 <- 2 hours ago, afk all game.
http://zero-k.info/Battles/Detail/806948 <- 2 hours ago, afk all game.
http://zero-k.info/Battles/Detail/806982 <- 72 minutes ago, afk all game.
http://zero-k.info/Battles/Detail/806998 <- 41 minutes ago, afk for 23 minutes (game length 26 minutes).
The public opinion is almost entirely against him from what I've seen, he's never commented or given an explanation for his actions even though he must've seen the comments plenty of times and the number of games he's affected is well past a slap on the wrist.
Personal (read: biased) opinion: it's time for him to go, even if not permanently.
Admins please take action as you see fit. Words are insufficient at this point.