Haha! Well, if 1 player is a turn from soloing and the other ~3 players choose to extend the phase more than 2 times, I guess that that player will complain with mods. Then you:
1) see who's voting 'extend' the 3rd time in a row
2) as the vote passes, unpause the game
3) let the winner win - who cares if uncorrect sore losers would be forced with all holds
4) give to those who voted the 3rd time, a 100
penalty.
5) open a thread and tell the story to everybody.
After that, nobody will try it again, I'm sure. No more annoyings for mods.
But that was a clear example. I guess there could be grey areas where mods will have harder decision to make.
Anyway, a 4-day extension should not be an issue for anyone. That's why I like it. That's why it should be easier than a unanimous vote. So even harder decisions won't be that hard, IMHO.