I wish driving was a sustainable and humane method of transportation, but it really isn't. I do love driving but I also agree that suburban sprawl is awful and not sustainable financially and environmentally.
I always signal out of roundabouts, but never on. Legally I'm supposed to signal in but that makes no sense to me because of course I'm going to be entering the roundabout, there is never another option.
I think you meant to say without central servers