Innovation in greeting

It's known that  salam is the islamic greeting and that Islam has pinpointed the relevant issues in full detail.

Those who act with carelessness like ignorant people,wrong doers among  the muslims, christians, jews and others, and cast aside the Islamic greeting  to use non muslim's greetings in immitation of their saying , HAVE been committed a wrongful act and have deviated from the right path and have fallen into innovation  which the Messenger SAW prohibited.

An example of prohibited greeting which very common to be used at these days are; "good morning", "have a pleasant day" , " have a nice day" and others form imported from outside Islamic jurisprudence and muslim community.... so avoid those kind of greeting and spread salam to our sisters and brothers by saying :"assalamualaikum............"