Facebook has privacy settings to ensure that you are able to control who sees your information, including photos, status updates, general information and your friends list. You can adjust your privacy settings to block strangers and non-connected people from viewing your profile; you can also block established connections from viewing certain parts of your profile. Sending a message to a person who is blocked by your privacy settings doesn’t allow that person access to your profile. Writer Bio

Can People on Facebook See Your Profile if You Reply to a Message  - 20