Well, I think, and I'm sure you already know this, you have to keep two things in mind: first, the death of a young man like Jett Travolta is one of life's greater injustices, so it's a natural human reaction to want to blame someone. I'm just not sure there is anyone or anything to be blamed when it comes to Jett Travolta. And, again, the ultimate responsibility belonged to his parents. Even if CoS doctrine preaches against, say, medication for seizure disorders (and I'm not saying it does, because I don't know), his parents were still responsible for putting Jett's best interests before the doctrine of their church (and I'm not saying they didn't, because I don't know.) That wouldn't make the CoS right, in my opinion, but it also wouldn't make them solely responsible.
That's not to say that I wouldn't be among those to consider the CoS responsible to a large degree if it came to light that Scientology doctrine may have influenced the Travoltas to the detriment of their son. I just prefer verified facts over speculation.
Secondly, you know, it doesn't help the wider public separate the myths from the facts about the CoS when one of your biggest celebrity members goes after Brooke Shields with unprovoked criticism and then rants to Matt Lauer about the evils of psychiatry and psychotropic medications. People don't just get their information and misconceptions from the net-when someone like Tom Cruise decides to publicly spaz out, it has a ripple effect.