I admire their spunk!
Context: I'm a Microsoft Office 2010 user, I never got a click with both OpenOffice and LibreOffice. I do have LibreOffice installed on my FreeBSD powered laptop but that's it. On my desktop it's Word, Excel and all from 2010.
So first of all: a major security flaw? I can see the risks but you honestly need to take this within context as well. It's not as if OpenOffice actively reaches out across the Internet. Also: cause & effect? You conclude that the change was made because of your probing, but can you really be sure of that without having checked what triggered the change?
See, I can do better than you guys here ;)
"OpenOffice is DOOMED, they shown refusal to fix an important flaw in the software. Previously they promised to include one security fix within their next release, but while thinking about writing this message (which took me one week at least, honest! <fingers crossed>) all of a sudden they changed the release notes and removed mentioning of this!"
Sure, I am kidding with the "one week preparations", but if you take that out of the equation doesn't this sound at least somewhat plausible as well? Better yet: it's even hurting the project even more! win win! or.. maybe not.
My stance is simple: just because a project doesn't use the same release cycle as their competitors doesn't mean it's dead. I also couldn't help notice that there wasn't one single link to back up your claims about said security risk. Which leads up to another possibility: there was no risk in the first place and so it got removed. Which is what you noticed, and then drew ridiculous conclusions that it had something to do with yourself.
Tunnel vision much perhaps?