So it's all true, a cell will and can bring down a weak receiver as "a HAM" said it's a common problem with skip,side band ,side lode, harmonic etc... Is it a problem to stop using them NO not enough to argue over, can it be proven good question and in my view it will never be proven. Cell phones transmit RF and a damaged one could to anything. We also allow cell phones I myself leave it on in the field box. Saved my a.. when Iam late and boss wants me [:@]. But a club solution could be to keep them at the pin area away from the other planes to keep peace in family.
Rich