I see your point, but no one would convert to Islam by seeing your religious salutations in your questions. So I don't see your point at the same time!
Let this site not follow what other Stack Exchange sites follow.
This is an SE site and we have to follow the network policy. There are some minor differences, of course; but I think religious salutations are completely unnecessary and some people might find it annoying since the site is not specific to Muslims.
I brought it up on meta.SOI brought it up on meta.SO, most people think it's up to this community to make the decision.