I guess your idea must have some merit but I've never seen/known anybody to drive around monitoring APRS beacons.
Interesting... but that is what APRS was designed to do. To be an information exchange, distribution and display system for mobiles.
Unfortunately, I fear you have been missled into the incorrect view of APRS as a "vehicle tracking system" which has nothing to do with what it was designed for. APRS was around since the 1980's and GPS was only folded in in the 90's when they became cheap enough. But tracking GPS modiles is only a small side benefit of having full tactical situational awareness, Local Frequency recommendations, Satellite's-in-view/frequencys/doppler, global messaging by callsign and global email text messaging from the front panel of your APRS radio.
Its because of the proliferation of tracking devices that has misslead most casual observers into only seeing maps of vehicles. If that's all they see, they are not seeing the local info displays that the APRS radios present to the mobile operator.
Kenwood has been abismal in their full page ads, because they never show any of the local info displays! They only show a dual band radio, mention APRS and GPS in the text, and leave the missinterpretation up to the 98% of readers who have never experienced APRS...
Another local NET that should be advertised to mobiles is whenever an AMSAT net is in progress. Just send out the beacon and do not be surprised if your fishing brings in some mobiles from other frequenceis checking into the net...
Please see the web page on these misconceptions: www.aprs.org/APRS-tactical.html
Bob, WB4APR
Robert Bruninga wrote:
Therefore, a TNC should be connected to the Retransmitter that activates an APRS beacon on the local APRS channel whenever it is keyed. This APRS beacon will alert all mobiles on the front panel of their APRS radios in range that the retransmission is in progress.