The rapid technological progress and world-wide spread in some areas as well as vast economies of scales make a lot of interesting adaptions possible. It is pretty much impossible to keep on top of all the clever adaption and there is certainly a great deal still to discover and to learn. Lots of possiblities out there.
For example micro and mini drones have become far more available through the rise of smartphones with it's high performance and yet cheap sensors. With every more capable batteries and smaller cameras and an increasingly large specific knowledge base with a lot of sharing as well as industry support they should become increasingly attractive for armed groups. Now drones like that and drones like the big heavily armed things are completely different beasts but even the former might become soon a 'force multiplier' among others. Personally I wonder if commercial, possibly modified* trail cameras have already been used in armed conflicts. They are quite in rage here among hunters.
*It might be a good idea to eliminate any signature like flash. In urban areas there should be enough backligh, while in open terrain one at ground level angled upwards could work well most of the time. Of course there is much scope for clever schemes behind the information gathering and the communication. Different settings on when and how the 'warnings' and the material gets sent would make a lot of sense. So in an urban it might send it over e-mail on after a couple of minutes of shooting a series of pics sending a couple of them over the 'net. In a forest area not far friendly forces it might get sent right away over MMS. It should be relatively easy to integrate it into data management system.
In one case one guy which I know with a passion for electric stuff had one camera stolen put a new relatively obvious one out in the same area with a GPS tracker in it and neatly camouflaged GPRS one pointed at it. The thief tried it again and got unmasked. Simple, yet effective.
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