You can make changes to these settings so that only some of them can see that you're on Facebook, or you can make it so that nobody can.
Ị nwere ike ime mgbanwe na ntọala ndị a ka naanị ụfọdụ n'ime ha nwere ike ịhụ na ị nọ na Facebook, ma ọ bụ ị nwere ike ime ya ka onye ọ bụla ghara.