A very young girl died of cancer. That's pretty sad, but I fail to see how it's anymore sad than the hundreds/thousands of people who die of cancer every day. Millions of people will have died of cancer by the end of this year.
So we have all these people tweeting this hashtag and coloring their Twitter avatar purple, because Rebecca's favorite color was purple (no non-sequitur there).
Why? Why are we mourning the death of this particular individual; what about her plight is so unique?
To me it just seems like bandwagoning.
Surely there's some aspect of this that I do not understand or of which I am unaware.