It is possible that you have landed here by searching for a solution against all the spam on your Facebook wall, but this post has mainly been crafted for the people which have been infected by malicious Facebook scams.
Malicious Facebook scams have the tendency to force the victim to leave specific messages on his/her personal Facebook wall.
The Facebook user is often not aware of these posts and it is possible that the scammers have inserted a piece of code which will hide the post from the Facebook user, but still show it to the friends of the infected Facebook user.
How to stop this
If this is the case, you will need to click on the “Activity Log” tab which you can find in your Facebook account settings. The “Activity Log” tab holds information on all the posts and comments that have been placed with your account. In the “Activity Log” overview, you will be able to select the malicious posts and delete them from your personal Facebook wall.
The Activity log tab provides the following functions for the posts:
Please make sure that you follow this guide to setup your social media security settings and that you read the guide on Deleting malicious Facebook applications to complete the full deletion of malicious applications from your Facebook account.