I would suggest the synonym, but there aren't too many of these questions, and I don't have the required votes in the tags to suggest it. If someone else thinks it's a good idea, could they suggest it?
Although I see kiamlaluno's distinction, that doesn't mean politeness and etiquette are worth their own tags, considering the relatively few number of questions that we get about them and the considerable overlap between the two tags.
If there are no further objections, I will merge the tags within the next day or two.The tags have been merged. If you have strong opinions against this, the merge and synonym can always be undone, but please make a good argument for it.