I've heared "Bang the Drum All Day" before in other stadiums. I think the Packers popularized it, but it's being used in more and more venues. Not on as a consistant basis as we seem to use it, though.
As for the Psycho package... It's hardly that original. The Patriots used it under Mangenius when he was their D-coordinator in 2005. The Ryan bro's have been using it for a while. With two of the three guys I just mentioned on the Browns' staff, I'm not that surprised that they're using it, as well.