FJR and Security
Having worked at FJR recently I can say that on the airport terminal approach road there are signs regarding no photography being allowed. On the other side of the runway, where the greater majority of mainly abandoned aircraft wrecks are slowly decaying in the sun and salt laden atmosphere, there is a main road where you can park and snap pics as much as you wont. There are no warning signs posted.
Its true that photography on any civilian airport is forbidden. But when going airside, a camera will not be permitted but your mobile phone, with camera, will be!!
If you are aware, as a foreigner, that in the UAE that in the event of any incident you are guilty until you can prove your innocence. I think this maybe difficult in this case.
As to 'sensitive military flying', does a foreign military helicopter doing a mail run once in while qualify?