When is it permissible to hack a girl's Facebook account because she is talking to young men in a non-sexual way, or talking to her lovers, or posting her pictures without a hijab and in revealing clothes? Does this necessitate hacking her accounts to enjoin good and forbid evil and close them? Is it permissible to use them to post Hadiths and verses?

Hacking websites and pages is forbidden and prohibited because it infringes upon the rights of others, unless the owner of the website is not considered respectable in Islamic law, such as belligerent disbelievers, or if the content of the website is not considered respectable in Islamic law, such as atheistic websites. As for personal pages that display some forbidden things, it is not permissible to hack them as long as they are not dedicated to spreading evil deeds; it is sufficient to advise their owner.