Yes Jay this is a problem and I can't help that. Clams and worms are one part. But it's the same problem if people quarantine and add another fish in the middle of the quarantine process, or don't use the proper amount of copper for the correct amount of time. Any method has problems if it isn't followed correctly which is why so many fish in this hobby are dying for stupid reasons.
If people are lazy they are going to fail no matter what they do. These are living animals and any flaw in their treatment will cause them to die and they will blame the current methods they are using even if they do it wrong.
I get that all the time, what you just said. "So all I have to do is feed clams and worms and I don't have to quarantine?". I never said or implied that.
People write me all the time and tell me their fish died after following my instructions, then they say they fed quality pellets and quarantined only for a month or dosed with copper. And put the fish in a bare tank with PVC elbows. Something you may do in a quarantined system.
I post almost every day, answer numerous questions on many forums, write dozens of articles,I spoke at quite a few aquarium societies and will do it again twice in the next few months and wrote a book. What else can I do?
I invite people all the time to my home and even tell them they can bring a sick fish to throw in my tank. It is not my job to force people how to take care of their fish. Thats up to them and I say it all the time, this hobby is very easy, but we make it hard. I am an electrician with no training in aquaculture and I never lose a fish to a communicable disease. How hard can it be?