I can't see how it'd hurt...
And you know, with the advent of YouTube, blogs, and many of the other free ways to promote a cause on the internet, there's really no excuse not to.
When I start my treatment on my PWS, I plan to create a blog about it and document everything about the process - doctor visits, insurance issues, pictures of recovery, etc. - and I'm going to give the URL to the local newspaper here and hope they'll run a story on it. What starts as a human interest article might turn into heightened awareness and understanding.
Hey, it's a start, right?