Ex-witlesses do judge--they judge the religion as being Not Acceptable. They start judging when there are blatant discrepancies between what the religion teaches and the Bible teaches or when they are grossly mistreated by the religion, and they are instructed that they are going to have to go along with the bad teachings until the leaders themselves fix them. They judge the hounders and pio-sneers, and for that matter anyone in the religion, when all they do is try to run other people's lives. (Remember, 1Thess 4:11 explicitly tells people to mind their own businesses, not nark on people for such horrible "offenses" as smoking).
Now, the witlesses are very quick themselves to judge. The world, and those who have left the religion, are judged as deserving destruction. Bird food, scum, poison, pigs and dogs, urine, and "goats" have all been heard at one time or another from the platform to describe worldly people. Apostates are judged even worse--they are classified as murderers. They also judge those within their own ranks: If you are not pio-sneering, you are not worthy of life. What are you going to do if Jehovah asks why you were not [insert "privilege"]? How dare you listen to that "bad" song or watch that PG-13 movie? Why did you miss that boasting session so you could take your family on the first camping trip you been on in 20 years? And so on.
As for the embarrassment badge, my advice is to not go at all. Short of that, you probably don't even need one. If they are using the embarrassment badges as ID, you are going to have to see if you can get one from the littera-trash counter or scan an updated one, since an out of date badge is only going to be useless to get whatever you need. And by all means take the damn thing off once you are away from the crowd--and don't be afraid to take off your suit and wear your jeans once you get back to the motel room. Hey, why would you want your suit dirty when you need it?