Counterfeit money being passed in cardrooms

Does anyone else think that cardrooms are a perfect place to pass some phoney money? I can't think of a place (even casinos) where it's common for hundreds of dollars are carried and passed around so callously.

Admittedly, I often accept $1000 cash from an otherwise stranger for a rack of chips as I'm leaving the table, or while at the window. I'm sure you've all done it.

Also, chips and cash floats back and forth between the floorperson and the players. I'm sure that would be an easy opportunity for a crook as well.

Obviously, you can avoid most concerns by doing mone transactions only with the cashier.

Has the thought of counterfeit money in a cardroom ever crossed your mind? Comments?