RE: what 2.4 article
Many products including the 2.4 RC radio is under the unlicenced digital transmission system by the FCC. When and if it starts to effect the licensed digital transmission, the FCC will regulate and will mandate that all digital transmission systems to become licensed. The airwaves are flooded by different 2.4GHz technologies, eventually new rules will apply and the FCC will grant authority to the licenced holder first.
If the phone companies or any other licensed digital transmission system holder starts to complain to the FCC that RC aircraft are the cause of interference to any of their 2.4GHz systems, say good bye to the 2.4GHz radios that's now being used in this hobby.
Can't say it any better than that, research it like I just did. This is what I've been writing about before, but I was basing it on memory, not what I researched.
Pete