The amount of numbers doesn't matter if you are doing just a random assignment. You could just use Seats 1-10. But I think that a lot of players (read: a lot of the fish) like the ability for uniqueness and customization. They don't lie awake at night thinking about datamining and how to stop it. And the rest of us like to know who everyone is, so while this would stop people from having thousands of hands on you, I doubt it would ever be used.