Remember remember, the 5th of November.....BS.
The mere fact that they have announced it in the fashion they have and given Facebook the (well, uneeded) warning forces me to call BS. From the limited encryption knowledge I have from a few college classes, there are encryption techniques which can be created that take the most powerful computer created (or that can be created) millions of years to decipher based on possible combination math. Being the social superpower that they are, I am sure Facebook already had in place the necessary encryption to keep these fools out, and if they didn't, you can bet they will now. The vulnerabilities found in those articles were as a result of poor security - not powerful hacking Rubicons
"...heed the warnings as follows"
Give me a break its Facebook not the nuclear submarines patrolling the oceans. Worst case scenario you have to call people or text message for a couple days until Facebook restores their servers from the 100's of Backups I am sure they have....