No, I simply apply common sense and reason.
Consider this;
Say 10K people buy an HDR, and 100 people get it to work beautifully, or even marginally. While most may actually be discreet and not advertise it or even talk about it, there are inevitably going to be a few who do, who exploit it for everything that it's worth. That's just human nature.
So 5 people get it to work and take it for all it is worth. What do they do with it? They would start prediction businesses and get lottery numbers, etc. thus proving it as legitimate and effecting a lot of events. It would get the world's attention in a hurry. It would go viral, even if it were only a 30% accuracy rate or something.
As soon as it did, the military and intel agencies would be all over it, government/lawmakers, etc. would be scrambling to figure it out. It would be on the news, all over youtube, the talk of the modern era. Companies would be trying to mass produce them, etc etc etc etc etc....
Look at what happened when the radio or television was invented, or the airplane. The HDR would have already followed suit.
But it's not like that. Instead we hear that it is a headache machine.