Could You Use A Facebook Timer?

Could you use a Facebook timer in the morning or at night? There are times you when go on Facebook to do one thing and then you get a message from a friend or see someone's status and before you know it an hour has gone by.
Some days I think we could use a timer - a setting within your Facebook settings that only allows you 5 minutes or 30 minutes at a time. Facebook could use it to it's advantage. Remember the days when you had AOL and when you signed in it said " You've Got Mail". It became so popular it was the name of a movie back in 1998. Some days on GMail I'm still waiting for the "I've Got Mail" phrase to be heard. It sure was catchy. Facebook has over 800 million users and more than half of them log on daily. That is up from 1 million users back in 2004. I'd love to know the statistic of how much time an average users spends on Facebook.
What phrases do you think Facebook could say on it's timer? They could have something catchy even though there was already a movie made on Facebook. 
Here are some phrases I thought of:
1) It's time to go - don't let Facebook make you late 2) Bye Bye Facebook - come back soon 3) Signing you out - love from Facebook 4) Farewell Facebook 5) Facebook us soon 6) Love, Facebook 7) It's only goodbye for now
I'd love to know your phrases for a Facebook timer! I'll add them in for tomorrow.