The only concern that I have when it comes to this BUR relates to stuff involving the Frieza Clan beyond Frieza, like in the games. Frieza's Golden form (and this will likely apply to his Black form too) is treated as something everyone of his species can get, which has resulted in stuff like Golden Cooler in Dragon Ball Heroes.
We have little fanart of Frieza Clan OCs, with only post #3425615 and post #4269448 serving as examples off the top of my head, but because of what I mentioned above, there's always a chance someone might upload art of either an OC (Xenoverse, Heroes, etc.) or one of the lesser characters such as Kuriza or Frost using the form, and the only tag that we have to be able to tag that is, well, Golden Frieza. The alternative would be to make a general tag in the same fashion as Super Saiyan, but with so few posts and most applying to Frieza already, such a proposal might be thrown out (unless we nuke Golden Frieza and replace it with the proposed general tag, but that seems unlikely too).