Last night I stumbled into an exchange of love notes on Facebook: two friends going on and on and about how great the other is, detailing the origins of their friendship, thanking the people who brought them together, etc.
I stopped reading after a few sentences, and avoided the thread thereafter.
There are many kinds of bad Facebook etiquette and I've certainly been guilty of several of them. I've even indulged a little in Facebook PDA's, though I try to keep it short.
I admit, I invest a lot of time in Facebook, because I like the basic format of saying something significant about my life in a sentence or two. I find Twitter's format of 140 characters a little too limiting, but Facebook is about the right space for me to say something I care about. I once posted something about how I even consider making daily summations of my life something of an intellectual and/or spiritual discipline. At one point I started recording all my status updates somewhere else, but then I forgot to continue. I keep saying that one day I'll go back through my entire FB page and make an accessible record of the good updates. (Which, I must say in all honesty, is most of them.)