DrivingWIMB: Do you always indicate just before you take an exit on a roundabout

[World's End Stella]

so that other road users know your intention and know - for instance - whether or not they can emerge safely or are you subhuman filth who deserves summary roadside execution?

Asking for a friend.

If someone is waiting to enter I almost always signal, otherwise never. I feel this might make me human filth although it could be worse, I suppose.

Here's an interesting one. You enter a roundabout to turn right, there are already people on the roundabout as there is a traffic light just after and traffic has backed up. The right exit has only one lane, who has the right of way as you go to exit?