vore is certainly contro, but it's a specific kind of it, hence the new tag.  As BW pointed out, the users who know what it is, and labeled accordingly even WITHOUT tags, such as you and a couple others?  No need to retag your stuff.  Rapefic should be tagged as rapefic. Lack of clear consent definitely equals rape. 
 
*sighs* More like it'll be MPreg with gender changing..