You do realize these are just blank forms you're supposed to actually print out, fill out, have notarized, and keep in a safe, right? It's not like we're talking about online financial or health care records. And if your terminal stage is something you truly want to help your family avoid confusion about, you do it well in advance.
Doctors or (more likely) family members conspiring can and will happen regardless of what you've done. It's still a greatly diminished risk as opposed to lacking any kind of directive at all.
bcobb: In the hands of morons like Sarah Palin, even the most well-intentioned, public good can be twisted into something fear-mongering and self-serving.