Great perspective from Boing Boing's Andrea James on the problems that "science by press conference" presents:
These stories got a lot of traction in our "First Post!" world, where everyone clamors to be the earliest reporter of this or that scientific claim, whether it's true or not.
If someone is convening a press conference to announce their scientific discovery, whether it's a perpetual motion device or the first human clone, it's advisable to ask why they seem more focused on publicity than science. In the meantime, thanks to the media, "vaccination rates have hit record lows here in America, and measles rates have skyrocketed accordingly."
James' entry is succinct, smart, and definitely worth reading.