As long as it's random, I really can't see where's the problem. Anyway, there's already a few standard ways for doing this. We listed them in this thread. If someone does the bogey-bogey, eats the cards, waits until they come out, look out the approximate order, place replacements in the same order, calls the president to ask him to give him a string of numbers, puts the card in the given order, then pick the cards in the order given by taking the date of birth of his opponent, reversed, and taking only every other number, then a judge can clearly declare that he's random enough.
The beauty of sarcasm is that when the person using it is totally incorrect, you can just remove the sarcasm and end up with a post that is actually correct.