why not ave a counter in the 'my profile' section of each player so it can be checked how often that player has skipped his turn.
it will stop people from skipping turns to their advantage and give people more incentive to not miss a turn, and make it so players can see if they want to play with other players who miss turns often.
the counter could also be visible on the scoreboard so players take more pride in never missing a turn (but not affacting their position)
whilei think this counter is a good idea it might be a bit harsh because some people do miss turns by accident. in the is case the counter or another counter could even count the amount of games the players been kicked out of for missing three turns.
i think that will definatly decrease the amount of time it happens