Well, I can't speak, "as a parent", or "from a parent's perspective", but I do have some common decency and an opinion on this, but it's mixed. I think that including the observation of an actual autopsy as a part of college prep biology courses for high school seniors is an excellent and great educational idea. HOWEVER, I do not think that ANY body should be autopsied in front of an "audience" who don't have legal or medical cause to be present, UNLESS the body has been willed/donated to science or the next of kin has signed a release. I am less concerned with the alleged "post traumatic stress disorder" that these teens might get from witnessing it and more concerned with the rights and dignity of the dead "patient" and their families.
I absolutely would NOT want any students (or other unauthorized person or group) watching anyone do an autopsy on MY family members, ESPECIALLY if they knew me/us and I would be even MORE opposed to it if their death was an accident, murder, or suicide, as it would have been so sudden and tragic. These kyds are'nt bound by any legal or ethical standards to treat what and who they see in a professional manner and what is to stop them from spreading intimate info about the deceased student all over town? No family should have to suffer something like that. Until now, I had NO IDEA that the city or county could just let anyone off the street in to see an autopsy and quite frankly, I think it's an appalling practice.
Either the body is donated or willed, release signed, or NO ONE sees the naked dead body and it's handling except the medical examiner and the undertaker and perhaps their assistants. That's my vote on the matter anyway, as a non parent.