If you’re using Jetpack’s Publicize feature in WordPress, you’ve probably noticed that all social network connections are automatically selected for you when you write a post. This can result in accidental sharing of posts to the wrong networks.
It’s pretty easy to turn off auto-selection though. Just add the following line of code to the functions.php file in your theme:
add_filter( 'publicize_checkbox_default', '__return_false' );
After doing this, you’ll need to select the networks that you want to share to each time you post.