For me, a Code of Conduct is not actually guidelines for how to act. For me, a Code of Conduct is what to do if there is a problem with someones conduct. When I get on a plane, I am told what to do in case of emergency here are the exits, heres how to use your life jacket and oxygen mask. I am not told every little thing that could be an emergency I believe that would be a waste of time and invariably something would be left out.
Similarly, for conferences, listing out all the behaviors that might be problematic is a waste of time, and invariably, behaviors are left out. In my opinion, that is a waste of time. What is NOT a waste of time is giving out the information of what to do in case of emergency.
At the MySQL Connect website, under the Plan tab, is a link to the Oracle Events Code of Conduct. It says, simply, to act professionally and respectfully, and if there are any problems, contact Oracle Security and gives a phone numbers. I like that. Simple, and effective. And it was put under the Plan tab exactly where it should be. Its something to note as you plan to attend.
I put that number in my phone and, thankfully, did not have to use it. But knowing that I had a plan in case something happened made all the difference to me.
*BIG DISCLAIMER I do not speak for all people everywhere on this matter, just myself.