It's perfectly fine, and actually a good tactic to use if somehow someone flubbed up early and lost a lot of theirs from the getgo. I'll agree that going back and forth to supply them would be rather oorp but I find that trading between combatants is A-OK. It's no different than tractoring in the bots and bats that have dropped from an opponent that you've downed.
And let's try to start a thread other than something about something or other that you don't like or want changed. Do something constructive.