The only convention that I went to before was PDXlan and there is a vicious cycle that can develop:
Attendees annoy staff members -> staff members are grumpy and annoy attendees -> attendees annoy more staff members ...
Since this isn't run by a multinational corporation, mistakes will be made.
One thing that annoys me is when policies or rules are made or changed and the reasoning isn't given, or when incidents are covered up with too much secrecy. It's a fine balance. People are uncomfortable with the unknown.
Issues arise in human communication, event organization, privacy law, and business management. These are all legitimate reasons for making a change to rules that might negatively affect people's convention plans and then say it was due to "negotiation". We mortals ought not question it.