[gnoway]

I think this is overstating the risk a little bit.

Looking at the video linked elsewhere, this was run in a bedroom on the second or even third floor of a single-family residence. He mentions not being able to detect x-rays more than 35ft from the device. I think a neighbor would have to be trying to get in range to be affected.

Here's the video again, queued up to the view out the bedroom window: https://youtu.be/92M5qcjDkaU?t=1m5s

[zamalek]

One of the the few times where the inverse square law is helpful.

[hexane360]

Reminds me of this: https://what-if.xkcd.com/29/

What's lethal at 3 inches probably isn't measurable at 50 feet.

[drjesusphd]

It's helpful all the time, since it allows stable orbits.

https://en.wikipedia.org/wiki/Bertrand%27s_theorem

[enraged_camel]

On the other hand, if the neighbor's cat starts growing a third ear, they know who to blame! ;-)