You might even use it in jail when dealing with dark market.
Does jail have internet access?
I see a problem with that, messages like this could result in escapes:
"Hello fellow gang members, from 9 to 13 we are let out of our cells and allowed to wander the yard, and the area is enclosed by a single layer of barbed-wire fence, I know of a place the guards don't see, please come with wire cutters. Be sure to warn me in advance."