Note: Publicize is now auto-share and is part of Jetpack Social.
Ever accidentally publicize a post that you didn’t mean to? This snippet will prevent the connections from being auto-selected, so you need to manually select them if you’d like to publicize something.
<br> add_filter( 'publicize_checkbox_default', '__return_false' );<br>
You can place this code snippet in your theme’s functions.php file, or in a functionality plugin.
Jetpack 