Frankly, I was pretty blown away by how poorly it's understood by physicists (although they are probably better than biologist). Even in experimental particle physics, where statistics are essential, the statistical techniques are all self-taught and seat-of-the-pants. I am confident everything being released by the major particle physics experiments is statistically sound after it goes through the collaboration review process, but there are certainly poor inferences being made at the level of the individual physicist. I listened to at least a couple of confused conversations between smart particle physicists about whether frequentism or Bayesianism was "right".