Facebook does not allow truly anonymous comments on personal profiles, pages, or most posts
You can comment using a separate Facebook account that does not reveal your real identity
You can use a nickname or limited-profile account if it follows Facebook’s rules
You can adjust your privacy settings to hide personal details from others
You can comment in Facebook Groups that allow anonymous posting or anonymous comments
If a group supports anonymous posting, use the anonymous option when creating the post or comment
You can avoid using your main account and instead use a secondary account with minimal identifying information
You should not use fake identity details that violate Facebook’s policies
You can delete your comment later if you no longer want it visible