If there’s one thing that drives many people bonkers on social media it’s the people who link their Twitter and Facebook accounts to auto-cross post everything. It’s the equivalent of hiring a robot to staff your accounts. And we all know, robots aren’t very social (apologies to R2D2).

When you see someone’s Facebook stream, and notice that a new post has been auto-posted from their Twitter account, that’s a dead giveaway that the person isn’t on Facebook at the time. Same goes for people who set up their Facebook accounts to auto-post every new post their to their Twitter account. When you see this, you immediately know your odds of engaging with that person is almost zero. Kind of defeats the whole social thing, huh?

Recently, I saw another prime reason why you shouldn’t link accounts. On Twitter, an environmental organization’s account went astray when their auto posts from Facebook started posting dozens of consecutive duplicate tweets. Obviously something in the auto-post settings became broken to cause the problem. The sad part is the organization won’t notice the error because they’ve decided their Twitter account will be for auto-posts from Facebook. But their followers will notice the tweet spam. Yup, a whole lot of unfollowing will be going on!

Here are three other BIG reasons to stop linking your Facebook and Twitter accounts:

1. Different channels, different posting etiquette: Have you ever unfriended or set the ‘Don’t show in feed’ setting on a Facebook friend who posts waaaaay too much during a day? It’s annoying. When you link your Twitter account to your Facebook, you increase the odds that you’ll be annoying. Twitter is a tool where there is far more frequency of posting. You might do 5, 10, or 20 posts per day on Twitter. Imagine if those 20 tweets are auto-cross posted to Facebook? Annoying! Unfriend! Understand that content you post to Twitter, or vice versa, may not be ideal for the other social media account. Besides, you likely have different audiences on each account. Be unique on each account!

2. You look really really lazy: When you link Twitter and Faceboo but only really engage on one channel, you immediately tell the world: “I haven’t got time to be a real person with you on Twitter (or Facebook, whichever channel is set to receive the robot posts).” People follow you because they want to engage. You’re not very convincing when you act like a robot.

3. Twitter is about conversation: By far, Twitter is treated like an annoying after-thought by many lazy Facebook users and organizations. They have a Twitter account because they feel like they have to. But they don’t actually want to be ‘on’ Twitter. So, they set up auto-posts from their Facebook account and figure, hey, problem solved. Um, not quite. On Twitter, it’s all about balancing four key actions: tweets, replies, mentions and retweets. That’s a whole lot of engagement. You need to be present to achieve all four and be effective at using the platform. When your tweets are nothing but auto-posts from Facebook, you’re missing the other three key actions of being social on Twitter.