Not all devices in the 2.4 gHz range have any sort of clear frequency detection circuitry at all. That is just not true. In fact, probably most don't at all and never will. It is basically an unregulated spectrum for the devices that operate legally in it. I challenge anyone to find any protection of R/C equipment operating in this spectrum. It is a situation where you operate at the risk of other devices in the 2.4 gHz spectrum.

Radio devices aren't governed by law. They are governed by the FCC here in the U.S. The FCC operates under a mandate. Rather, the FCC dropped interference resolution duties about 5 or 6 years ago. They pushed it on to local authorities under protest by the ARRL (the ham radio equivalent of the AMA, but with more teeth and firepower).

The reason I know about this is that my other hobby is radio listening. I'm not a ham, but I've kept up with radio spectrum news for many years. You can learn a lot by visiting the ARRL website at: www.arrl.org. You can search the topics. Looking up what Broadband over Power Line will do is quite scary too. If you read what the AMA has pumped out in articles and official opinions in Model Aviation, you will find some contrasting surprises at the ARRL site!!! There are other good radio related sites with good info too, and some good monthly magazines devoted to the radio hobby.