The Office of the Supreme Leader

Not answering salām aiming to forbidding munkar

Q: Is it permissible not to respond to the greeting of someone who commits evil as a way of stopping and discouraging him?
A: According to Islamic law it is obligatory to respond to the greeting of a Muslim, but if refusing to respond to someone’s greeting with the intention of forbidding evil is normally interpreted by common view as prevention and discouraging the evil, it is permissible to do so.
700 /