thing about funny money is if you set your self up for a bit of counterfeiting and got caught you would do major time for it,its one of them crimes that this goverment takes very seriously and rewards you with a holiday in the cooler.
i have seen fake money and was impressed by the way it was made, they had watermarks and everything exept the silver in a real 20 when held up to the light can be seen to weave in and out and these were just dotted along.