If someone reads the messages that contain fortune-telling and predictions for the future believing in them, then he is rightfully subject to the warning which says that he has disbelieved in what was revealed to Muhammad (peace and blessings be upon him) and that no prayer will be accepted from him for forty days. For more, please see the detailed answer.

If someone fears that he may have affected someone else with the evil eye because he liked or admired him, he should say say: Barak Allahu laka or ‘alayk

For protection from the jinn, you can say these du`as: 1- Seek refuge with Allah from the jinn: 2 – Recite al-Mu’awwadhatayn 3 – Recite Ayat al-Kursi 4 – Recite Surat al-Baqarah 5 – Recite the last verses of Surat al-Baqarah 6 – Recite “La ilaha ill-Allah wahdahu la sharika lah, lahu’l-mulk wa lahu’l-hamd wa huwa ‘ala kulli shayin qadir 7 – Remember Allah often (dhikr) 8 – Say the adhan (call to prayer) 9 – Recite the Quran as it offers protection against the shaytan

Jinn possession is proven by the consensus of the imams of Ahl al-Sunnah wal-Jama`ah. If a person who has this sickness is rational, then he has the choice and he will be brought to account for his words and actions. But if this sickness has overwhelmed him to the point that he has lost his mind and free will, then he is like one who is insane and is not accountable.