It's a little frustrating when you base your strategy on grabbing their 3 cards only to have them dissapear because you forgot they were going deadbeat.
So, turn 3 we get a warning "player x will be kicked next turn for being a deadbeat"
Turn 4 they get kicked.
OR
On turn 3 we get a popup: "would you like to kick player x for being a deadbeat" then if all/majority say yes, then they are kicked on turn 4
of course, if we set deadbeat time limits at the start of a game then this wont make much of a difference

Just a thought
Twill