
The easy solution is to disable the glamour system during PvP. Assuming it will be based on equippable items with toggles that change your appareance, or even a crystal with a look stored within (kinda like how gear sets work, but with a gold-sink item), or anything like Rift's system, then the game could just toggle it off during PvP matches by default. PvPers don't have to worry about being mislead while letting PvErs dress however they want.