I agree. If you are waiting for a person's response, you should be given extra time... or if that person is just "teasing you" why not kick that person off? or at least temporarily silence them?
If they don't respond in 5 minutes, they are silenced, the other player has an additional 5 minutes to make ONE move and their is not further conversation between the 2 players.
It's a few extra minutes, but only effects one jerk.