[digi_owl]

Best i can tell, Doze is supposed to cover that automatically. But then Doze will wake the device up if a GCM priority notification comes down the wire. And i expect Facebook and the rest to start spamming those to make sure they get every nanosecond of your life to their servers.

[e40]

Yeah, I don't see Google allowing me to stop Facebook (and others) from constantly checking for updates, etc.

[devsquid]

Settings>Data Usage>Click app>Disable Background data.

Not ideal, but it works if its really an issue. Actually FB does not consume much bandwidth unless you are using it.