Yes, by infrastructure I meant roads and railways. I figured that the ability to bomb farms, trading posts and other improvements would be a bit too much.
Though that could work if anti-air units would intercept aircrafts based on the flight path of the bomber (so basically if the AA gun is in between the target of the bombing run and the 'home' of the bomber), rather than the area near the bomber target area. Then you wouldn't have to saturate your lands with AA guns.
To balance that, the possibility to destroy a road or a railroad could be difficult, and need a lot of bombing missions (2, 3 or more).
Promotions could reduce the number of bombing missions, Accuracy etc.
(i think that Dale's DCM MOD has a variable percent of Building destruction in city from bombing, or range attack from 1 to 2 ?)
Could this be extend to road and rail road and improvments ?
-Roads, railroads, improvments and buildings (in cities) could have damage statistics and a particulare amount of difficulty to be distroyed,
-could be protected by stack of military Units, repared by workers, even stack of workers to speed up,
-the bombing missions and range attack mission, or pillaging could be made stronger with promotion like "Accuracy", etc.
More, rebuild a 600 hammers improvment destroyed, could be faster for the owner because you allready have the Tech and "savoir faire".