Yep, ARFs have their place. It is when people get them, and don't seek advice, or help to fly, then fire it up in the neighborhood, and cause mayhem, that the idjits are screwing it up for the people that have a goal to achieve, and respect the current rules. When I was a teenager, my friends that saw my planes said:"Can you hook little bombs on them, and get a BB gun or a .22 to fly around and shoot?" Obviously, they did not become part of my circle of flying friends. The problem is: now their ilk can get something to perform those highly illegal operations, and the technology is there, so they don't even need to know how to fly. Look at the guy with the chopper-safety seems to be far from his checklist of things to do- if the omission of an AMA number is a hot button for him.
I have to admit...I have one C/L ARF, and one R/C ARF. They were both hand-me-downs, as no one else wanted them. They aren't of the quality that I would build into planes like that. Soft wood, poor glue joints, backward covering, on and on. The problem is also---they fly okay! They just will not last as long as a plane that you or I can build, ourselves. The newbies don't know that; and they just shell out their money.
So, without getting one's teeth knocked out by some idjit at the field, how can it be enforced? Everybody would have to be a tattle-tale. You know how a person has to be 21 years old to purchase alcohol? what would happen if you had to be an AMA member to buy modeling supplies? OH NO!
The rules are there for a reason, and the few who blatantly disregard them, are going to be the ones that screw it up for everybody else. The problem is: the few are becoming the many.