Precisely why UAV ops are strictly controlled in the UK, limited to active danger areas (either permanent or temporary) and always deconflicted by height from manned aircraft. It is a different matter on ops, of course, but airspace control measures do exist to manage the risk.
With respect to 'what we should expect from non-aviation Army bods', the UAV batteries of the RA take this matter extremely seriously and are bricking themselves with the thought that one of them may be the first to have a mid-air. Their 'air-mindedness' is good considering that they are relatively new to the game.