Also guilds etc. shouldn't know if I steal or kill somone if I'm not seen or in my uniform, as they wouldn't know it to be me.
Also the uniform should build up a "name" like the gray fox from oblivion. It should appear in papers and eventually on wanted posters. Civilians should recognise him.
Finally I should be able to knock out a civilian, put him/her in the uniform and tell the gaurds I have found the infamous "name here" and assuming they were the same race etc. they would arrest them and cease looking the the uniformed person.