Adding users as friends without proper introductions. If you’re looking to make friends, tell people who you are. Don’t assume they know you, especially if they don’t.

Abusing application invites and consistently inviting friends to participate in vampire games. Many call this spam.

Abusing group invites. If your friends are interested, they’ll likely join without your “encouragement.” And if they don’t accept, don’t send the group request more than once by asking them to join via email, wall post, or Facebook message.

Turning your Facebook profile photo into a pitch so that you can gather leads through your Facebook connections. Thanks, but no thanks. Facebook is about real friendships and not about business—at least not primarily.