[quote=@13org](aka, if someone gets their hands in one of those and reverse engineer it) they can replicate it as well.[/quote]
Without getting their hands blown off when the thing goes [b]BOOM![/b] you mean? :hehe

[quote=@13org]Considering making the low hum audible to everyone if one pays enough attention, so the device is easier to find (well... they'll know that its something strange the second they see it... lol)[/quote]
Hiding it in something like a light fixture, which also generates a low level hum, should not only minimise the risk of it being heard but would also make it more difficult for someone to accidentally find.