using piratebox?
never tested the extreme range of it...
a few blocks perhaps at most ...
unless you have something that can boost the signal ...
say hooked up to an old style roof antenna ...or taller...
and having landscape height as well...
say the top of a high rise...or elevation like a hill or mountain ...then you could very well increase your range to miles ...
boosting the power output will also aid in boosting the signal strength..
put an aerial on a van...
drive around ...
broadcasting ...
and you would never get caught ..
you could speak your mind ..
start your own radio-free pirate-radio ...

Also ....
you could do what that maemoian did...
strap a n900 to a Parrot drone...
have it do a specified search pattern in the sky...
and every time it encounters a drone ...via signal ..
it hacks the security and zombifies the drone ...
zombie drone follows the lead drone....
and you continue until you have a gaggle of drones..
Build your own drone army.

or what another n900 user did...
who created a prog that detects the slightest movement in the area ...
via sonar.
Perfect for setting up a couple n900s around the office, house ...wherever...
In discrete places not easily or casually seen when entering the area...
...anywhere where you require a "heads up" on inbound "guests" ...
excellent say if you need to rest or nap or do something where you do not wish to be surprised by "company" ...

excellent for covert, subvert, any old 'vert ...works one must do.
The N900 and fellow n8x0s may be old...
but..
contrary to popular opinion...
hardly obsolete or outdated..
There are lots of valid use cases for the n900.