Drone pilots regularly die due to the source of wireless signals being found. Especially in the built up areas where they cannot operate from a trench or bunker. It is a challenge but there have been methods for this for a while now and it has shown. Even recently there’s been reporting that priorities of some drone teams are now purely anti-pilot activities compared to other targets.
True - and I hope I didn't give the impression that drone operators aren't taking significant personal risk, but compared to the alternatives for short range indirect fire (mortars) it seems like these systems should be less vulnerable?