I like the above suggestion of Imagelessbean's with a manual booby trap.
If they are going to cry to much about it, another suggestion would be to make a cost cycle for the flares.
Want to instantly place flares on all post? Click the commander button. The button will charge you munitions based on how many flags you captured. Or maybe make it a flat rate (not based on the amount of flags). Anything other than a free, microless ability with nothing but full benefits.
OKW floats munitions now anyways with the latest patch.
It's unfair for all allied factions to let them have so much intel for 0 munies. Therefor a price for it would be the least.