Good to know.Technically you can't really pass it back and forth. You randomize your deck and present it to your opponent, who cuts or shuffles. After that, you aren't allowed to do it again. You are allowed to request that a Judge shuffle your deck rather than your opponent.Does anyone know how many times you can pass a deck back and forth to shuffle? If I ever saw someone doing fishy stuff to my deck, I'd riffle shuffle it and pass it back until he got tired of stacking it.
Until a few days ago, I was always of the mind that an opponent was more likely to stack his deck rather than mine. Now I'm a little wiser, but I don't want to jump wildly at things that just aren't there during a Comp REL. But knowing what I know now, I'll look at my opponent a little bit more closely during shuffles and follow my gut.