This should be an easy one...

I am not Muslim, but I am fascinated by religion and try to read etc on the major religions. I am unclear, however, about the correct use of ṣalawāt ("PBUH" etc) when referring to prophets by name: is this requirement intended for the speaker/author, or for the listener/reader, or both? More specifically, as a non-Muslim, would it be actively inappropriate to include such? Obviously it would not serve me to offend a listener/reader by either including it inappropriately, or omitting it where the Muslim reader/listener would expect it.

Even when used (or not) incorrectly, I expect most people would probably give me the benefit of the doubt and simply write it off (correctly) as ignorance, but: it would be good to have clear guidance in the correct usage by a non-Muslim (I am reminded of the potential issues arising from the salam)