My local charitable game has the players shuffle one deck while the other is in play. I noticed a bent card in my hand and pointed it out as I mucked. It was a tourney and a few people freaked out about the clock but it was off while they replaced the deck. the dealer offered the old deck to anyone and I asked for it to practice shuffling since I dont even have a deck of cards.
This is the deck used in both tourneys and cash games, another dealer noticed the faux pas and grabbed the deck up from me and gave me a couple fresh decks from a local casino.

That was messed up for the one dealer to have offered me that deck huh. Im not competent enough but anyone good couldve benn a card mechanic with that deck.