How Long Would it Take you to get a Fake Passport? Could you Disappear?

At least I knew going in but wow these crime tangents go everywhere. Witness protection, prison pen pals, fake aliases, forging documents and could you disappear if you needed to? I've been on a big true crime kick lately and wow does it show. And is there any worst insult than if you go back in time and that person call you dumb? Someone with decades or centuries or less knowledge than you have