Right, so I'm actually going to address the technology, not the outlandish conspiracy theories about oil companies snuffing out competition.
To separate water into burnable hydrogen and oxygen, you need a shit load of energy. Any undergrad chemist can tell you this. In the diagram, nay, in ALL schematics, either the problem of this power is cleverly not addressed or its "secret technology". I understand that people may want to have patent rights, but come on. If people are bring murdered for keeping these trade secrets, why wouldnt you just put the instructions on the internet? Why dont we ever see a shred of proof that what they say actually works? Its all bullshit as far as I'm concerned, and until I see some good hard facts and solid scientifically examined and proven experiments, I'll remain in my tepid state of disbelief.