How to Stop apps from waking other apps?
This is in essence working against the Google cogs' planned L app integration/cross-communication. Integration is usually good/well received.

My first guess is that you have swiftkey set to sign in with facebook and possibly have plume (twitter) linked with facebook. Try to revoke these permissions first to see if it fixes the problem.

One thing that may help you is to get rid of the android facebook account and instead either rely on using the browsers mobile facebook page, or sign in every time. I'm not sure how much this path would muck up facebooks usability.

Another option is to set up automated facebook freezing: How can I automatically freeze and thaw an app on demand?

Freezing is one step beyond hibernation and no app link or background process can thaw without deliberate action.