Your argument is two-fold, so my reply must be as well.
If the vote is in response to the reporting of the fact: Well, if it's for that reason, then fine. I however (apparently much like the other 90-odd percent of this sites readership) don't feel the need to express myself that way just to celebrate the reporting of something news-worthy. If everyone's logic worked that way we'd have an exorbitant amount of positive voting on everything - 'yay! it's another piece of news!'.
If of course, to counter your second point, you mean it's positive in the fact that its reporting on the life of someone influential that's just passed - a somewhat valid fact in this case, then again fine.
Important bit:
However, my argument is that an article like this (or any other) should be rated by its contents and by the information that it puts across to the reader and it's according to this information that I would judge it by. In this case the the story is clear, Jerry York is dead. The appropriate response in any logical or proper emotive way is to approach this news with a level of sobriety, if it must be boiled down to a base level of being either positive or negative then it must, without a doubt, always be the latter.