Facebook is noisy when you don't log in for awhile.
I just checked the email account that I use for stuff like Facebook. Most of the mail in the inbox is from Facebook kindly letting me know that I'm missing bunches of notifications and updates because I haven't logged in for awhile. The only computer I ever log into FB from is the one that took a turn for the worst. It's the only one I had that logging into Facebook didn't make the machine slower than molasses. I wonder if anyone on Facebook has actually noticed that I haven't logged into it in three weeks.