Mostly it makes me sad to see that the people who make disparaging comments are just not educated in the aspects of Elvis as a human being -- that is, not the parody that has profoundly saturated the general media. I feel sad for these people, who are probably more into Paris Hilton, etc., than a real artist.
Ultimately, I feel sad for Elvis, who must have felt some of that at the end of his life. A lot of times, negative comments are fewer than positive ones, but people (me included!) tend to hear the bad news more than the good. My theory is that Elvis might have feel as if he had been tossed away like old newspapers when the new editions arrived.
I'm reading "Elvis and Gladys" by Elaine Dundy--her theory is that the Colonel must have orchestrated the whole "don't take Elvis seriously" attitude through controlling Elvis' movies, so that he (Colonel) can retain control over Elvis for good.
As for what I would say or react...I don't know. It is taking me a while to "come out" as far as being an Elvis fan.
Thank you for a thought provoking question!