It's hard to say. The reason why one would want so many Queens could be due to the following:
1. The player losing refuses to resign, and the player promoting such Pawns to Queens is doing so to spite his opponent for not resigning.
2. The player promoting such Pawns to Queens is trolling.
3. The player promoting such Pawns to Queens discussed this with his opponent, and his opponent agreed to such a trivial thing. It's a challenge to see if he doesn't accidently stalemate the game with too many Queens on the board.
Fewest moves, most direct result is the correct way of playing. Cashing in with a slew of dames speaks volumes to the world that you dinna know what you're doing.