Most players probably won't care at first, but if they fire too many shots in a shooter game where the bullets don't despawn, the whole game will eventually lag out.
My main reason for posting this was to see if this problem will be fixed in the next update and, if not, offer a simple way for the players to do it themselves. Either way, my hope is that it can get fixed before too many people start to care about that issue, so it doesn't ruin their impression of the game.