Well, I would prefer that they still indicate no matter what. In particular the roundabouts that have a left only lane and a straight ahead lane. When I am entering from the left of them I prefer to know that they understand what the arrow pointing left actually means.
I have stopped often when they dont indicate and they do turn left, and I have also pulled out when they are going straight ahead and had idiots honk their horns and floor it at me when I do pull out, for having the nerve not to read their minds.