Show Satan your middle finger (as Constantine did) and rejects
the offer (to go home).
If the God has any any foresight at all, over-zealous to fill what
heaven with good souls means problems in the mortal world, in turn
lesser good souls would be generated for heaven, and the more eager
this God will have to send for good souls...
Which is no good.
The more efficient this God is to quickly fill its heaven, the more
less effective is heaven in the future.
If God is almighty and holds divine wisdom, then heaven must be
perfect democratic and God is not autocrat. For if he is indeed
autocrat, he won't be foolish enough to do such short-sighted
thingy. Good souls should stay longer in mortality to help good
souls and create a good environmen. Ie. Satan should be busier than
God, not vice versa, in searching trash for hell. 
