I find it very bothersome that we can't see other player's decals/faces, unless we have the same one downloaded.
So here is the big question, is it possible to make an addon that fixes this, even with hacky workarounds?
Maybe have the downloads be passive while your walking around in server? I honestly don't know how this would be done... I honestly would not care for the risk of players making nsfw stuff as a decal, it happens all the time on other games like in tf2 with sprays and stuff usually never gets done about it, and if it does happen I guess you could make it so you can "block" a player's decals in the player list.
I think this would only work better if it would be done through the engine though.