This will probably come off as quite presumptuous, possibly pedantic, and will surely piss at least some people off; after all, who am I to tell you how to conduct yourself in your own social network?
I'm the guy who was glad to connect with you on Twitter. And then on Facebook. It was nice to get to know you. I could follow your sometimes useful thoughts on Twitter, and when appropriate, get more personal by looking at your pictures on Facebook. It was grand! We formed a typical "we're not hanging out right now drinking beers but I bet if we met at a conference we'd get along like old friends" type of relationship typical of the kind encouraged by the likes of Twitter and Facebook.
But now, though.... you know what? I think I'm getting too much of you. Don't take this the wrong way. You're swell! You're interesting! You're charming. But dammit, you're lazy. Sorry. I know you're busy. Let me rephrase that. You're thoughtless. No, wait. That's not right either. Ok, another shot: quite possibly, in the busyness of your life, you didn't give full attention to the potential downsides of updating your Facebook status with your Twitter status.
This is to be expected. I did it myself, about 3 seconds after I signed up on Facebook. It was basic Geek instinct: "Hey, I bet I can hook Twitter up to Facebook, thereby saving myself from typing the same thing twice." You've unlearned copy-paste well. Good for you! Except there's a problem. In doing so, you've contributed to the rampant noise problem on Facebook. Now, all the people who follow you on Twitter now have to see the same damn thing on Facebook.
You've saved a few seconds of redundant typing, but you've created a kind of reverse-copy/paste problem for the people who follow you.
You're not alone. Quite possibly a lot of the people you follow in both streams do the same thing. You're in good company, to be sure. How were you to know any better?
There's another problem. I bet you know about it, but you write it off as the unfortunate collateral damage of your dual-update glory: there are people who follow you on Facebook who have no clue what you mean when you tweet "RT @somedouche [insert completely noncontextual geek thing here]". Nope. Aunt Jenny has no clue. Cousin Sara... she now thinks you're a bigger dweeb than she did when you last kicked it at the family Christmas party. Also, she's learning to ignore you. You're teaching her that.
Do us all a favor. Disconnect Twitter and Facebook. Unshackle. It'll be good for you, your "real" relationships, your acquaintances, and the global technological noise pollution from which we all suffer. FB and Twitter are different applications, with different purposes and most likely different people attached to you. The people in both groups are giving you their time because they think you're worth it. Pay them the same respect in kind. Pretty Please. With a cherry on top. It might take you a few more minutes a week, but you'll get used to it. You'll continue to blather endlessly (we love it, we really do!) on Twitter. But you'll be more mindful about what you post on Facebook.
Your FB friends will thank you. Your tweeps won't know the difference.