I thought it was particularly interesting that I was referred to another doctor inside the same medical system sharing an EHR (ie they already HAD my data)and I still had to sign aa new HIPAA form less than a week later. That was the single time I didn't insist on reading the whole thing, I asked them if they were the exact forms used across the entire hospital system, I double checked one of them, and then just signed the rest.
My real fun experience with this was when I bought a house, one thing said I had to move in within 30 days, another 60 days, and another 15 days. There were also various other date discrepancies on when certain things had been completed and, they had used my full name (first, middle, last) in some places and just first/last in others. Man everyone was mad I was reading everything before I signed it though.