I don't think we should use it. As we community have both professionals and learners. This more sounds like a word used by professionals to learners and other people who don't follow ancient Sanatana Dharma, in an offensive way. But we can't restrict anyone to not use it. We can just flag if the word is being used in offensive manner and explain the same to the mods. 

And yes, we should edit all posts if it has been used in non-relative context of the post.