I predict this will happen a LOT more often with git 2.0 changing the default push behavior to pushing all branches. If you've ever --force pushed over a temporary remote branch (e.g. to show something to a coworker), 2.0 will run the risk of overriding everything. Hooray!
But these were lots of repos and not just forks, but the look of it - If that's the case, I'm guessing some scripting was involved, so the defaults wouldn't have mattered.
