There can be ups and downs to a forced thing like this.
An up like you mentioned, would be server side default skins, tools, textures or whatnot.
A down is when the server amins decide to be assholes and force things such as naked skins, or something, because they think it 'funny'.
It also sounds like it would be rather complicated to make more than one default skin for those RP servers. Not eveyrone will want to be jediskinned, or imperialtrooperskinned, and heaven forbid people wanted to make their own but it gets overwritten. The skins may be better off moderated manually by the people running the server.
Armor, weapon, and tool textures, perhaps, though, would be awesome, if it can be done via grouping (guard armor vs whatever in this case).. or for medieval fantasy, arcane robes magically protected versus diamond plate. Weapons? magestaff versus diamond poleaxe.
Also, rather hesitant about the idea of doing it via cookielike. From what I've learned about cookies, anyway.
Rollback Post to RevisionRollBack
me - "I feel like being evil today."
friend - "Don't do it! Crime doesn't pay!"
me - "So? I'm not doing it for the money."
I agree, character skins should be left up to each individual user.
Maybe a class system could be incorporated that determined the style of armor each player gets.
As with the cookie system, I don't mean for it to be exactly like the the one that a web browser would use, maybe just a zip folder downloaded for each server you visit that contains textures sounds and etc.
the folder should be a reasonable size (under 700KB?) and users should have the option to disable custom items (if their offensive or cannot run on their computer properly) but should not be able to edit them.