Preventing posts from certain boards from showing up in leaderboards/recent messages components?

Hey Vincent,

The only way to do this as far as I know is to use the hide from lists and menus as described here: http://lithosphere.lithium.com/t5/support-knowledge-base/Hide-from-lists-and-menus/ta-p/66690

This will hide the board from all lists and menus, you will then need to provide your own link to the board so that it is accessible.

Hope this helps,

Yuri