Also, is it rude to unfriend someone on Facebook?
It may not be rude to you but it may be rude to them, or the other way around. In this case you should do what you feel better doing. As you said, those people don't even greet you, they're not your friends or anything, you simply know them because they go to your school.
Similarly, what happens if you unfriend someone on Facebook? The person you unfriended won't be notified. If you don't want someone to see your profile, add you as a friend or send you a message, you can block them. Note: If you unfriend someone, you'll also be removed from that person's friends list.
Subsequently, one may also ask, can you delete a family member on Facebook?
Removing a family member—If you'd like to remove a family member, tap on “Remove family member” instead of “Edit family member” from the options shown by tapping on the downward arrow. A confirmation message will appear. Tap on the “OK” button to remove the selected family member from your profile.
Is it better to block or unfriend someone on Facebook?
If you unfriend someone, you can still see each other's public posts and everything on the other person's profile that she made public, including photos and updates. However, when you block a user, you automatically unfriend him and neither of you can see each other's posts, public or otherwise.
