To help it out a little.. I talked to a local expert of Radio communications, my father, about this issue. Yes it is true that having a closed metal loop, flying wires is going to create an attenna effect but, since RC is opperates at 72 mhz it wont be even close of causing interferences. If our RC was opperating at around 1000 mhz you could probally see some effect but, with a low power emmiter (TX) wont be enough to cause a differance. But, of course its better to be safe than sorry. He gave me like an hours worth of mathmatics and history to prove the point but, im not about to try to explain that.
Also i asked him about the metal to metal vibrations, ie metal clevis with the metal carb arm. RF interference is going to emmitted but, not enough power to cause a differance.
we all look for an excuse when we get shot down by radio glitching. I'm sure someone here will speak up and read from the holy RC bible what the facts are. But in my opinion it's like smoking and drinking.
That is a very good point you do carry. Granted having all this metal wires everywhere on a plane "could" cause interference but, its something that gives people an excuse to blame something for a horrific accident. With today now everything is operating via Radio broadcasts anything could happen, so if you flying something very personal to yourself why not and be safe than sorry.