What is the ruling of Islamic law concerning the presence of topics in forums that include personal opinions which contradict what is known from the religion, or that justify forbidden acts, and are those in charge of the forum sinful for leaving them?

Forum administrators must delete falsehoods that violate Islamic law, and they sin by leaving them, because they assist in misguidance. Some scholars have gone so far as to mandate the destruction of books containing forbidden material. As for members who cannot denounce it, they must withdraw from the forum, lest the Qur'anic warning include them. Countering deviant beliefs is the responsibility of scholars, and it is not permissible for those without knowledge to delve into specious arguments due to the danger this poses to their faith and their potential to mislead people with a weak response. One who is in such a position should avoid forums that propagate falsehood. Some scholars have prohibited looking into false books, especially for those not firmly grounded in knowledge. However, it is permissible for someone deeply knowledgeable and strong in faith to look into them in order to refute them and expose their secrets.