Forced or not, many Muslims will "count" the conversion as having been made. If you try to reject Islam after having publicly accepted it, you are an apostate and are subject to death. These guys should get away from the Middle East for their own protection.
Quran; Surah 004: Ayah 089
Take not friends from their ranks until they flee in the way of Allah. Seize them and slay them wherever ye find them; and take no friends or helpers from their ranks.