It strikes me that the ladder would make no sense if you matched based on anything but ELO ranking.
A more practical measure would be to introduce a warning level lower than 4 minutes, say 90 seconds or 2 minutes. If you hit the warning level 3 times in a game, your opponent can force a resign. If you hit the 4 minute mark once, same thing.
A more practical measure would be to introduce a warning level lower than 4 minutes, say 90 seconds or 2 minutes. If you hit the warning level 3 times in a game, your opponent can force a resign. If you hit the 4 minute mark once, same thing.