Shaykh Saalih Al-Fawzaan was asked:
“Oh virtuous Shaikh, May Allah facilitate for you [good], what is the ruling on placing display screens at the back of the Masaajid to display Ahaadith and some rulings to benefit the people?”
“No, display screens and writing should not be placed in the masjid and nor should posters/banners be hung. The masjid is free from all these distracting affairs. The salaf did not hang papers of the remembrances for after prayer. Have the people reached a level of ignorance to this extent? The commonfolk know what to say after the prayer. They meet each other, they learn, from practice. There is no need to write on boards/banners and hang them in front of the people. This is from amusement and innovation inside the masjid. Yes.” End translation.
Faisal Ibn Abdul Qaadir Ibn Hassan