WRONG! Empathy came back to life when a friend of mine sent me a message!
I couldnt believe what I saw, so I checked again and again...there was no empathy process running after empathy got killed, although running mc-tool showed that there are all my accounts still available (online). I guess mission-control restarted empathy once I got a new message!
What this means: If you do not shutdown empathy nicely, you may be online without even knowing it! You can see whether you are online or offline, running empathy-accounts which lives in its own process now.