Who cares if they "vanish into ARF/RTF oblivion"!? They are enjoying model aviation, and contributing to your Local Hobby Shop a profit so your LHS can be around to help you order your Forest-In-A-Box, or finishing parts and products for your next build.

I know and see many scale model ARF enthusiast across the country and at my local flying sites. The pilots that succeed further into the hobby are the people that receive the needed help and warm welcome by people in the hobby that are willing to step up and offer help. People come and go in this hobby. IT IS THE FACT of any hobby. ARFs are not to blame for people loosing interest. More people are driven away by the negative people at the field. So don't be that negative crotchety old guy that likes to sit on his ass and watch the newcomer wreck his airplane because YOU DID NOT REACT AND HELP when you heard his engine is too lean or rich, or the poor model pilot fought for the last 45 minutes to get his engine to run and you know 9 times out of 10 that scenario leads to a crashed plane 20 feet past the end of the runway.

I believe being proactive to making sure those pilots get the help they need so they are safe,enjoy themselves, and feel welcomed at the field.

P.S. If you don't feel confident enough to help, ask one of your club mates to step up.