not really as most modern airborne weapons platforms operate bvr, even if they were on the horizon, and your array of cameras were operating in optimal conditions there is a still a hard limit on the effectiveness of such a solution.
For offensive work, yes. If you control the ground, though, and are policing a defensive perimeter against air attacks on targets in the interior of your territory, you can make and distribute the camera stations cheaply enough that it doesn't make sense destroying them.