Only the main question remains: why do you need this if you could simply crack your neighbour's wifi by using a high-gain antenna hidden behind the walls of your own flat?
This comment reminds me of the initial response to Dropbox [1]. Sure, you or I, a very technical group, could set this up manually. But I was suggesting you manufacture, or part together a very simple box. The idea is this would be easy for non-technical people to get their wifi. Basically, plug in this box and in 30 days, you will have your neighbor's wifi password.
What I am asking is: how is this device better than another (used-friendly, packaged) device, that can work from your own flat? Moreover, selling that device with a high-gain antenna isn't any more against user-friendliness that selling a few boards you're supposed to hide yourself.
Sending a device to your neighbour is essentially a liability. A liability that, compared to simply listening to the traffic of your neighbour - can easily give the enforcement agencies enough material to lock you up.
The truth is that hiding the same device inside something else should be done by the user, because the moment you start putting those into a specific model of a plush bear, the picture of that plush bear will immediately appear in security advisories.
