Assuming the server will still run on 0.3.DL, I'd suggest that we should have the ability for custom tattoo textures, including the ones existing in game which can be viewed in a textdraw based menu, pretty much how /badge works but the command would be /tattoo [playerid].
The player skins often can be different to what actually we might be representing in-game and giving each roleplayer their own custom skin does sound like a huge hassle, so with this method we can make the roleplay more interactive and immersive.
Doing the command aforementioned will let you see the exposed (or, already visible) tattoos in places like neck, hands, or other parts of the body whereas others requiring the player to roleplay a strip for frisk. This can later be used by cops and others to identify et cetera. The faction management can look into giving gangs thier tattoo texture slots.
An example of how the design can be done for the textdraw (just a quick sketch made in PS?
EDIT: Updated the thread. Also these will not be available as clothing items or "attachable" - but instead, would only be seen in the menu.
Pretty sick idea to be fair. When I originally read this I thought you wanted them to be clothing items and then I was gonna be a little concerned but re reading it made a lot more sense and actually is something that would be an amazing addition. I like this a lot.