Only two classes have disguise so that would make them a more viable choice for people wanting to play criminals. For one, both classes can steal. Two, most people hate classes that can steal their ****. I say leave it alone, disguise is an easy way to be able to not just get at someone who's after you, but also get away from someone who's after you. Say there's a thief who knows you're a thief, but you're disguised as a Ninja. So they come in trying to get after you, so you're able to disguise as something else and you go Warrior and pop some poison just in case, zip by him and run for the Guild and if you make it and slip in, you're safe for a short time. Or say someone is breaking into your guild because they can't disguise and you know they have ranks and you can't beat them because you've already tried, so you hide and sneak and disguise as something else just as they walk in and run off to the other guild just so you don't get hurt. Yeah, sure it'd be nice to disguise your wanted flag from shop keepers, but hell, do you really want more people playing classes who can steal your ****? No one would be in cities after that and would make some people that are already hard to play a bit harder because they're looking in their inventory to see if they had their **** stolen or not within the last 5 seconds.