Tbh I'm not really fussed if people have to look at my brake lights, never bothers me if I'm behind someone with their's on for any length of time.
What if it were a fog light tho'? People will leave their fog light on, albeit in foggy conditions, even tho' there is a car right behind that can obviously see them.
I'd guess you would get pretty frustrated having to stare at one rear fog light, whereas you're not bothered about having three times as many bright red lights shining at you. 
Cars having their fog lights on when not required, both does and doesn't bother me. It doesn't bother me from the perspective of getting dazzled. What bothers me (mildly) is that they just look stupid when blazing in broad daylight. Not something I would lose sleep over.
Somehow brake lights don't cause me any particular distress, but obviously do to others. To qualify what I said previously about brake lights, it is my usual practice, if I'm stopped for any more than a few minutes, (i.e, at level crossings or traffic light junctions), to stick it into neutral with the handbrake on - the old fashioned kind not a high tech button! I'll be sad to say goodbye to my handbrake, it's the end of a beautiful relationship
