"I like to reserve my accusations for ones I can prove malice"
You aren't really putting the two and two togethor. Blindingly trusting DropBox in light of evidence to the contrary, and before real malice rears its head, seems like a mistake.
If the "issue" still exists (which I bet it does after all this time) then it is clearly malice.
https://bits.blogs.nytimes.com/2014/04/18/protests-continue-against-dropbox-after-appointing-condole...
One of the main arguments against Ms. Rice is based on a 2005 television interview in which she defended the N.S.A.’s warrantless surveillance program.
http://www.wncinfosec.com/dropbox-opening-my-docs/
"Regardless, the .doc files seemed to have been opened for some reason. I’d like to know why…"