If subscription tags are highlighted, would you have to make it so that the "darklist" highlight takes precedence over the subscription highlight? You could have a monstergirl NTR manga, but perhaps the NTR is very light and you might be missing out on something. Or you dislike futa, but there really isn't much futa at all (I've seen it before and been quite disappointed). And a dual highlight seems like it might be potentially difficult depending on the coding.