Would having these things atomizing water just amount to moisture being left on the floor, creating a slip hazard? At least fog and haze evaporate.
We have a couple of smaller fogger/light units that are meant to be in little fountains. The one thing I can tell you from using them is that they spray water everywhere while creating that fog. If you take a look at the video you posted again, you'll see the water splashing up as the fog is created in the bucket and sink. So, the larger versions seem to have the same problem if having your water contained is the plan.
Another aspect that concerns us is that the fog is water vapor. I think the the folks at the House of Hydro are being a bit disingenuous when they say it's so dry that you can use it around electricity. There's a reason all bathrooms have GFI outlets nowadays. And the House of Hydro is selling most of their units to increase the humidity in plant and animal enclosures. Humidity is simply how much water vapor is in the air. The higher the humidity, the more water you're dealing with. Water ain't dry... that's just the rules.
If the fog was so dry you could use the misters anywhere, then why are they selling waterproof fans for venting the fog? Think real fog and how it leaves everything with a wet layer, and you can see the drawbacks that it might have inside if you're pumping it out onto a linoleum floor all night.
Short term, the way haunters would use them, there are probably few drawbacks to using these misters on steroids. Still, I'd be inclined to put them somewhere that the water vapor can condense without causing a hazard to guests.