This is one way of enforcing these standards. Think of them as "interfaces" that everyone is exposed to and encourage to implement. It's up to you to go along with them or not, but for the benefit, sake, and sanity of your team members, it is recommended that you stick to them. If one doesn't and things start to get buggy or not compatible, then other would ask you why you didn't follow the implementation.
It is unfortunately that something like this has to be implemented because it is common sense, but if PyCon or any other organization has to be policing their attendees like children until the learn, then so be it.