I was on a boat dive today and we had two people go into deco "accidentally". I am wondering how can you accidentally go into deco? I have had a few computers and they all say it as big as can be on the screen while you are diving how long you have until deco. If it gets low you head up as to not incur a required deco since as a basic diver you are not qualified to get into deco. I guess that this is just a big rant that if you cannot keep track of the few things that are required that you should not be diving. If you can't watch your gauges, don't go in the water. You become a hazard to not only yourself but to everyone that is with you on the dive. I don't really know any other way to get a persons attention that if you are not qualified for something don't do it. Plan your dive and dive your plan and you will live to do it again.
Though I do completely agree with your statements, a lot of good things happen because unqualified people do things they are not qualified to do. A lot more people die or get hurt because they do things they are not qualified to do.
Look at Jacques Custeau. He was inventing what we do now. He was not qualified to do what he was doing, he was directly inventing this sport.
Normaly I ran out of gas before entering deco.