I think the noise could be a problem. You don't really want live streaming video with a constant drone in the background - or foreground. As for the blades, our 135gm helicopter's blades aren't a problem, stick your fingers in and they just stop. But the ROAM's must be much more ( say five times at least) powerful, so I'd be testing them with a tomato or apple first!
It could only be a range of velocities depending on pitch, motor torque and profile. And any noise probably depends on the material, too. The Sprite's blades look shorter and stiffer than ROAM but as it seems to be exclusively outdoors (and 1.1kg) they don't appear to be concerned about safety so much; and it is described as "low noise" - although I don't suppose "sounds like a chainsaw" would ever make it into a press release.
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