First of all, Kali is not "different" from Backtrack, it is the rebranded name for a new version of the same product (at least, to my understanding - it's not something I handle regularly. Please correct me if I'm wrong...)
In general, I tend to disagree with ALL requests for "my question is about [X], make me a tag [X]!" from new users.
First, because usually there already other tags that could fit, but the new user is just not aware of them; and second, because by definition a tag should not have a single question. Tags are used most of all for categorization (also searching and some SEO, but most of all the categorization) - a category of one is not really a category. When there multiple questions that should be categorized together, as in "this question has something in common with that question", then it makes sense to create a tag for them.
Tags should not be used as a list of keywords that is a replacement for, or a summary of, the question itself. Indeed, tags should not add any new information not already present in the question (not saying this is the case here, just clarifying my position).
Removing the tag now just saves on tag-cleanup later, especially after it gets misused a lot....
That said, I did already have a second thought (and mentioned this in the chatroom...), that perhaps kali should in fact be created as a synonym for backtrack, or perhaps the opposite direction. Since it is not my forte, I left it there to consult with those that know...
