I remember sitting in on an interview that another manager was conducting. There was a guy around 30 being interviewed who brought another older man with him. The older guy introduced himself by name, but didn't really explain the relationship between the two.
The older man completely blew the interview for the actual applicant. The actual manager doing the hiring was a younger woman, who was dressed in business appropriate attire. I was wearing jeans and a long sleeved t shirt. For reasons that I'm going to assume were sexist/ageist the dude only questioned me despite me clearly not running the interview. He kept asking about other positions that might be available that had nothing to do with the graphic design one that the interview was for. Shit was bizarre.
A few weeks later the applicant called in to ask about the status. I was transferred the phone call because the other manager was out that day. I told him that we went with another choice. I did take the opportunity to ask who the other guy was. Turns out the applicant lived in a halfway house and the guy was essentially his escort to make sure he wasn't out getting into trouble. I mentioned that next time he might want to leave him in the lobby. Living at a halfway house is fine. Bringing a rude guest into the interview is not helpful for getting a job though.
I don't believe in belts. There should be no ranking system for toughness.