i am not someone who is ever going to publicly grieve over a sleb, i'm just not caught up in their lives. there are some people who love all the drama, who are constantly looking for the next emotional outpouringcos they are very emotional themselves, but i would think that they are a minority.
however, when john peel died, i did feel quite sad, i had listened to his shows for so long, they were kind of part of my cultural background. to have that suddenly removed felt very odd, and did affect my life in a very minor way. i didn't feel the need to 'go public' with that, but soemone more emotional than me may have wanted to.
with diana, a friend of mine had been in the closet almost his whole life (he was in his 40s), but the way that she acted with AIDS victims, which made quite a difference to the media view of homosexuals, really altered his life in a very profound way. when she died he was scared. he thought things would return to the bad old days of being an outcast, so for him it really was a genuinely emotional time.
however much we agree with it, people in the news who become a rallying point over an issue like that, do kind of 'enter' our lives, how we respond to that will vary according to our personalities.
but, yes, being a 'stiff upper lip' kind of person, i do sigh a little when some (a minority) appear to be jumping on the bandwagon, in a kind of 'look at me, i'm soooo upset' sort of way. but that by no means covers the full range of responses.