Well, conference organizers are holding themselves to the exact same standard (any code of conduct would apply equally to them!)
Organizers tend to be the people who contribute the most to the community of anybody. They work long hours of (uncompensated) volunteer work and endure a lot of headaches. Yes, you may get a petty tyrant or two, but in general they are good people.
Finally, it's not like any of this is going to come into play for the vast majority of people. It's pretty much an agreement to treat others with respect, refrain from harassment and personal insult, and so forth.
Unless a conference attendee does something unkind to trigger these "rules" they are going to pass unnoticed.