The craziest were often the ones most devoted to the field service.
I had a brother like that in my hall but to be honest he is the only JW I know that I have any respect for. He lived what he believed 100%. Literally every single person in our area knew who he was and knew Jehovah’s name because of him. If JWs actually believed the end was right around the corner they would all be acting more like that. The bible pretty much says you are going to look like a crazy person because of your preaching doesn't it?