I'm struggling to see the point of this
Dropping barrel bombs on Aleppo neighbourhoods may be dispicable, but at least there is a military purpose (you know, once you've killed everyone, there won't be any rebels left. Much like the WW2 bomber command tactics). Attending peace conferences while continuing to drop barrel bombs? Again, I can see the point - it might just convince some people that you aren't heartless murdering bastards, or at least wish you didn't have to be.
But hacking facebook? What could that actually achieve? How would it benefit the butcher and his henchemen holed up in Damascus even one iota?