They will exactly not listen to your warnings and will still use facebook despite of what you have said. When we are online our data privacy is vulnerable and our personal information is at risk of being stolen and not only our infos but also there are some surveys or quizzes that can be seen in facebook that when you answer, it stores the collected data and used it for other things without our permission. So in order for us to be a little safe using facebook we should not try and click everything that you see in it and we should check always on what information we are giving facebook.