I wonder if it will eventually be possible for EMTs to routinely wear tiny portable video cameras such as the ones some police wear clipped to their collars/helmets etc? This would mean that in events like this there would be recorded evidence of exactly what happened -and of the person refusing treatment. (Easier than trying to get them to sign a disclaimer). It might also cut down the number of assaults on EMTs -or at least mean easier prosecutions for those responsible.