It deserves noting that Facebook allows you to tag people you aren't friends with if you're having a discussion in the comments as well as want them to see your remark.
Ọ dị mma ịmara na Facebook na-enye gị ohere ịkọ ndị mmadụ na ị bụghị ndị enyi ma ọ bụrụ na ị na-enwe mkparịta ụka na ihe ndị ahụ ma chọọ ka ha hụ nkọwa gị.