The rebels are fucking idiots. Why do they put their radios in completely indefensible positions? I hate radio missions. You don't even have time to find a defensible position after turning the damn thing on, and there is often no high ground or if there is high ground then it is the direction from which the enemies are coming. Or if you manage to find a defensible position you can be 100% sure you won't have a line of sight towards the radio.
Sometimes I accidentally shoot some of them.