While I was working for a fairly large fire department, I personally knew three guys who committed suicide, a couple of others who attempted it, and several killed in auto accidents and through other tragic circumstances. Bad things happen, sometimes. I'm not justifying Playboy, but this is a manufactured situation. Playmates don't die at any different rate from the general population, or for different reasons. I would concede that girls willing to pose nude are probably a little wilder than those who won't. I also think that girls who get involved in hard core pornography probably have much more drug use, suicide, etc.
For every wild girl, there are several who desperately wish to be wild - but can't.
Many good girls end up worse than the bad ones, as a result of trying too hard to be bad.
"...but if you took a cross section of any 600 people chosen at random, you'd probably find some similar things in similar proportions."
President of my Senior class died the night of graduation, from drunk driving.
Scholarly nerd type, not typical hell raiser. Many assorted flavors have died since, including several in Vietnam, drugs, alcohol, suicide, auto wrecks, heart attacks.