So...what. The enemy can see where they placed their own bombs? This thing is going to be 100 meters or so (at most) away from a humvee with people in it.
That was the same argument, by the way, for why it didn't matter that the drone feeds were non-encrypted. The enemy already knows where they are, they already know that the drone is there, the video feed gets them nothing.
The aerial drones are not immediately near ground troops. A little RC truck would never be very far from them. Therefore, by picking up video signals from the cheap recon device, combatants could know where the ground troops are going to be very soon and from what direction they're coming.
Furthermore, picking up the source of the RC controller would mean combatants could tell exactly where the troops are. In the case of an aerial drone, piloting happens from an air conditioned trailer, often across the globe. So that's less of an issue.
That was the same argument, by the way, for why it didn't matter that the drone feeds were non-encrypted. The enemy already knows where they are, they already know that the drone is there, the video feed gets them nothing.